Market rules
When the market opens, members will sell hardware they own and post small AI jobs. These rules explain a private trade under Swedish law, what a listing must contain, and how to check a used graphics card before any money moves.
Beginner
A private sale, paid only when you can see the item
The market board opens later.
A purchase from a business follows consumer legislation. A purchase from another private person follows the Sale of Goods Act, köplagen (SFS 1990:931). You and the seller may write terms that replace the default rules in the Act. A right to cancel after you have paid exists only when both of you agreed to it before the sale. Look at the item. You cannot complain about a fault you must be assumed to have known about. If the seller asked you to inspect and you skipped that without a good reason, you cannot complain about faults an inspection would have shown, unless the seller acted dishonestly. An "as is" sale can still be faulty if the item differs from what the seller told you, is in much worse condition than the price led you to expect, or the seller hid a serious fault they knew. Sign two copies naming the people, the item, the condition, the price and the handover.
The Swedish Police advise a buyer to avoid advance payment to a private seller, to meet and take the item, and to slow down if the other person rushes. Leave links they send unopened. Keep card details to yourself. Approve a BankID prompt, Sweden's electronic identity, only when you started the check. Handing over a personal identity number still leaves you exposed to fraud. With Swish, confirm the payment name is the person you met. On this board the photo is one you took, with your name and the date handwritten in the same frame.
Questions before I pay a private seller
I am about to buy a used computer part from a private person in Sweden. Ask me, one question at a time, what I have checked: whether I have seen the item, what the seller told me about faults, whether we agreed any right to cancel, how I will pay, and whether the payment name matches the person I met. Then draft a one-page agreement with blank lines for the two names, the item, the condition, the price, and the handover. Use plain English. Remind me that handing over a personal identity number still leaves the fraud risk in place, and that a BankID prompt is only for a check I started myself. Stop after the draft. Do not tell me the purchase is safe.
Intermediate
Hobby, business, and how a listing behaves
Sell personal belongings you have used yourself, such as home electronics, only now and then, and the Swedish Tax Agency says you declare the sale only when the profit is more than 50,000 kronor. Only the part above 50,000 kronor counts as capital income. Make no profit and that occasional sale stays off the return. Sell goods regularly and you declare the income at any amount, as a hobby or as a business, according to the purpose and the scale.
Paid tasks you take now and then are employment income. Take tasks regularly, in a professional way and in order to make a profit, and the Agency says the activity can be a business. You declare the taxable income yourself. A figure a platform reports does not replace your return.
House rules once the board opens: offer hardware you own and have used, or a job you will do yourself. Buying only to relist at a higher price is refused. A job post states the result, the file format, the deadline, the price, who owns the files, and what data the worker is given. A listing lasts 30 days, then closes unless you renew it. After 24 hours the description locks, so the item cannot be swapped. You may still lower the price or end the post. A bid becomes a sale when both people confirm the item, the price and the handover in one message. Until that message exists, either person may step back. Polaris stores the listing and does not take the payment or keep the hardware.
Sort my sales into hobby or business
I live in Sweden. In the last 12 months I sold some used computer parts from my own projects, and I took a few paid jobs setting up small AI tools. Using the Swedish Tax Agency's published rules on selling online, list the facts that decide whether each amount is an occasional sale of personal belongings (including where a profit above 50,000 kronor is declared), a regular sale of goods, occasional paid work, or work done regularly, in a professional way, in order to make a profit. Ask me for the amounts and how often I did each thing. Do not give me a tax ruling and do not invent numbers I did not supply.
Expert
Training data, synthetic media, and used server cards
Personal data is information that can be linked to a living person: a name, a face, a voice or a chat. IMY, the Swedish Authority for Privacy Protection, says the GDPR applies when such data is used to develop or run an AI system, including when a model is trained. The EU Artificial Intelligence Act (Regulation (EU) 2024/1689) applies alongside the GDPR. The Commission service desk dates prohibitions to 2 February 2025, general-purpose model rules to 2 August 2025, and Article 50 to 2 August 2026.
Article 50 requires a machine-readable mark on synthetic audio, image, video and text, so it can be detected as generated or manipulated. The article lists exceptions for minor edits and crime-fighting uses. Whoever deploys a deepfake, a realistic image, sound or video a system generated or changed, has to disclose it. From 2 December 2026 the desk lists bans on systems that generate non-consensual sexual deepfakes of identifiable people, and on systems that generate child sexual abuse material. Annex III high-risk rules are dated 2 December 2027.
A dataset listing names the source, the license and any personal data in the files. Stolen data, stolen sign-ins and malicious code are refused. The opening lines say if an AI system generated or materially changed a picture, voice or video. A used data-center graphics card is listed with nvidia-smi and nvidia-smi -q -d ECC,TEMPERATURE,POWER from the seller's machine, plus a sustained-load note and a memory-test result. ECC is error-correcting code, the card's count of memory faults. Members may not advertise the planned community station.
Check a dataset and a used GPU before I list them
I want to offer the following on a community board. Dataset and model: [paste what the files contain, where they came from, the license, and whether any face, voice, name or message from a real person is included]. Hardware, if any: [paste nvidia-smi output]. Against the GDPR and Article 50 of the EU AI Act, list the disclosures I should write in plain English: personal data, license, machine-readable or visible labeling of synthetic media, and deepfake disclosure. Then read the nvidia-smi paste and tell me which lines show the product name, memory, temperature, power and ECC counts, and which lines are missing. Flag stolen data, malicious code, non-consensual sexual deepfakes, child sexual abuse material, and any machine I do not own. Do not invent test numbers or a license I did not paste.
House rules the board will enforce
The report form opens with the market. Until then, keep the listing text, the messages and the payment record. The penalties below are the steps the board will take, in order. They are house rules, separate from a police report or a court claim.
| Rule | What it requires |
|---|---|
| Your photo | A picture you took, with your name and the date handwritten in the same frame. |
| Your property | Hardware you own, or work you will do yourself. Stock bought only to relist at a higher price is removed. |
| 30 days | The post closes after 30 days unless you renew it. |
| Lock after 24 hours | The item description locks. Price cuts and ending the post stay open. A different item needs a new post. |
| A bid | Becomes a sale only when both people confirm item, price and handover in one message. |
| The board's role | Polaris stores the listing. Payment and hardware pass between the two people. |
| Data and media | Source, license, personal-data note, and a visible label when AI generated or altered the file. No stolen data, stolen sign-ins, or malicious code. |
| Server cards | nvidia-smi summary, ECC, temperature and power, plus a load note and a memory-test result. |
| The shared station | If the community machine is bought, members may not advertise it or parts taken from it. |
First breach of a listing rule: the post comes down, with a warning that states which rule. A repeat, or a first post that offers malicious code, stolen data, a non-consensual deepfake, or the shared station: listing rights pause. A further serious breach: the account is removed from the board. Disagree with a removal and you reply on the same report, with the original post and your evidence attached. The answer names the rule and the step on this ladder.
If the money has gone and the item has not
A seller chooses the carrier. Paying a freight fee to a courier named by the buyer, before you have been paid, matches a pattern the Police describe.
Contact the other person and ask for the item or the refund, and keep that message. Then call your bank and ask whether the payment can be stopped. After that, report the fraud to the Swedish Police on 114 14, or at a police station. Call 112 if the crime is happening now or the police are needed on the spot.
Bring the listing, the chat or email, and the payment record. The Police define fraud, in Chapter 9 of the Criminal Code (brottsbalken), as deceiving someone into an act or an omission so the deceiver gains and the other person loses money. When the dispute is about the condition of an item you actually received, and you know who sold it, the Consumer Agency says a private-sale case you cannot settle is brought in the district court. Many municipalities also offer consumer guidance, and the help varies by municipality. Home insurance sometimes includes a legal-expenses cover. Ask the insurer before you hire anyone.
For a faulty item that did arrive, write to the seller, say what is wrong, and say what you want: repair, a price reduction equal to the cost of putting it right, or, where those routes fail, the return of the item and the money. Add receipts if you claim extra costs. A manufacturer warranty follows its own terms and often names the first buyer. Read those terms, or ask the company that first sold the item.
What to paste from nvidia-smi
nvidia-smi is NVIDIA's system-management tool for its GPUs, on supported Linux systems and on 64-bit Windows. The manual is the reference for which flags exist. Output is for people to read; NVIDIA notes that the text format can change between versions.
On the seller's machine, paste:
nvidia-smiso the product name, driver and memory are visible.nvidia-smi -q -d ECC,TEMPERATURE,POWERfor memory-fault counts, temperature and power. Combine display types with a comma, as the manual shows.- The same temperature and power query during a sustained load, with the duration written above the paste.
- The result of a memory test the seller ran, including the tool name and the date.
Unsupported fields print as N/A. The manual says that, outside the GeForce Titan series, the rest of the GeForce range returns limited information. If ECC is missing, the listing says so in a sentence. Watch the commands on the seller's screen, or on a call where you can see the window. A text file emailed on its own is weaker, because it can be edited. Installing a binary the seller sends you is outside this check.
Resetting ECC counters (nvidia-smi -p) needs administrator rights. A seller who cleared the counters should say so, and should still show the aggregate figures the driver allows. Clearing aggregate counts is unavailable on Ampere and newer, according to the same manual.
If the community DGX Station is bought, it will be owned by Hrafninn Industries AB, and that machine, and any part of it, stays off the market and is never a member's ad. About the shared station
Sources
- Buying from a private individualEnglish guidance from the Swedish Consumer Agency, proofread 9 April 2026: inspection, written terms, faults, the private-sale cancellation rule, delivery risk, and where a dispute goes. Sentences on this page paraphrase that guidance. The agency page is the official text.
- Sale of Goods Act (köplagen, SFS 1990:931)The statute, in Swedish. Sections 19 and 20 cover "as is" sales and what an inspection, or a refused inspection, means for later complaints.
- Classified-ad fraud (annonsbedrägeri)Swedish Police advice, reviewed 3 July 2026: advance payment, meetings, links, BankID, Swish, courier tricks, and how to report. The page is in Swedish.
- Selling and renting out onlineSwedish Tax Agency, in Swedish: the 50,000 kronor profit line for occasional sales of personal belongings, and the switch to hobby or business when sales are regular. You still declare the income yourself.
- EU AI Act implementation timelineEuropean Commission service desk. Dates used here for prohibitions, general-purpose models, Article 50, the 2 December 2026 deepfake prohibitions, and Annex III. The page says it reflects the Digital Omnibus on AI.
- Article 50, transparency for certain AI systemsService-desk text of Article 50, based on the EUR-Lex consolidation of 27 July 2026. Use the article text. The short summary on that page is labeled there as explanatory. Covers marking of synthetic media, deepfake disclosure, and the link to the GDPR. Artistic, satirical and fictional work uses a lighter disclosure that still tells the viewer the media was generated or altered.
- nvidia-smi manualNVIDIA's manual for the flags on this page, including -q and -d ECC, TEMPERATURE and POWER, and what N/A means. The tool's plain-text layout can change between versions.
- How the AI Act relates to the GDPRSwedish Authority for Privacy Protection (IMY), updated 26 March 2026. The AI Act and the GDPR apply in parallel, including when personal data is used to train a model. Page in Swedish.