Know what it sold for before you buy

Sold Signal prices every listing on Vinted, Vestiaire, Leboncoin, Wallapop and Kleinanzeigen against real sales in the same condition, and shows the margin you'd keep.

Add to Chromefor free
Sold-price check Condition-aware Seller and item trust Net margin and max offer

See it on a real listing.

From a Speedy bag on Vestiaire to a vintage chore jacket on Vinted, a Pokémon card on Wallapop or a graphics card on Kleinanzeigen. Pick a sample, change its condition or asking price, and watch the verdict, margin and max offer update.

What competitors miss
Like-for-like sold price Condition-aware Confidence level Net margin and max offer Seller and item trust Best place to resell
CheaperPricier

Example listings and prices, for illustration.

Works where you buy. Priced against what really sold.

13parameters checked on every listing
5grading companies for slab cert checks
1W–1Yprice history on every item you track
6marketplaces read across Europe, from Vinted to Kleinanzeigen
Badges on search results

Spot the deal before you even click.

Every listing in your search results gets a colour badge with its estimated margin. Scroll a page of bags or jackets and the good ones stand out. Click any listing below to open the full analysis.

Search results on Vinted, Vestiaire, Leboncoin, Wallapop and Kleinanzeigen
Sold Signal on
Strong buy Good deal Negotiate Avoid
How a verdict is built

Three checks, one colour.

Open a listing and the add-on runs the checks a seasoned reseller would, only faster. Green means buy, amber means negotiate, red means walk away.

Try it on a listing
1

Like-for-like price, with a confidence level

Asking prices lie. Sold prices don't. Each exact variant is priced on its own and every estimate says how sure we are.

  • Bags by model, size, canvas and condition; vintage by brand, era and size
  • Cards by grade, grading company, language and edition
  • Same condition only, from Mint to Damaged or sealed to missing parts
  • Excludes lots and wrong variants
  • Confidence from the number and freshness of matched sales
Median of matched sales: High confidence
2

Seller trust and item reliability

A great price from a two-day-old account is a risk. Sold Signal scores the seller and the listing itself, and flags signs of fakes. It never claims an item is authentic: it tells you where the risk is.

  • Account age, review count and rating
  • Stock or reused photos, missing date-code or label photos
  • Requests to pay outside the platform
  • Graded slabs checked with the grader's cert database
Seller trustmaison_claire, low risk
Account open 3 years
64 reviews, 4.8 average
Payment stays on the platform
Item reliabilitySpeedy 30, check one point
Original photos, not found elsewhere
Wear matches the stated condition
No date-code photo. Ask the seller
Slab cert checks withPSACGCBeckettSGCPCA
3

Your real margin, and what to offer

A deal is only a deal after fees and shipping. Sold Signal works out what lands in your account, the highest price worth offering, where to resell and how fast it usually sells.

  • Buying fees, shipping and resale fees per platform and country
  • Max offer for your target return
  • Best resale platform and typical time to sell
Condition-aware pricing

How the engine finds the right price.

Every category is priced from the sources that know it best, then narrowed down to the exact variant, the same condition and recent sales only. Pick a category and a condition to follow the path.

Why Sold Signal

Other tools tell you a listing appeared. We tell you whether to buy it.

Alerts are everywhere. What resellers lack is the answer to one question: if I buy this, how much will I really make, how sure are you, and can I trust the seller?

ParameterSold SignalThe VaultVintAlert ProTelvin BotApify deal detector

Based on each tool's public description, October 2026. A dash means the feature isn't listed.

Categories

Built for what resellers flip.

From luxury bags to graphics cards, each category is priced from the source that knows it best, on the marketplaces where it trades.

Luxury bags and accessories

Priced by model, size, material and condition, from never worn to worn, on authenticated sales. Date-code and serial photos are checked for, and risky listings are flagged.

Louis VuittonChanelHermèsDiorGucciPrada
Read on
Vestiaire, Vinted, Leboncoin, Wallapop
Priced by
eBay authenticated sales, then StockX

Vintage and premium fashion

Workwear, denim, outdoor and streetwear, priced by brand, era, size and condition, from never worn to worn, so a 90s jacket isn't compared with this year's.

CarharttLevi'sArc'teryxRalph LaurenStone IslandPatagonia
Read on
Vinted, Vestiaire, Leboncoin, Wallapop, Kleinanzeigen
Priced by
eBay sold index, then StockX

Trading cards

Pokémon, One Piece and Yu-Gi-Oh!, raw or graded, by condition (Mint to Damaged) or grade, language and edition.

Read on
Vinted, Leboncoin, Wallapop, Kleinanzeigen
Priced by
Cardmarket, PriceCharting, eBay

Computer parts

GPUs, CPUs, RAM and SSDs, by exact model line and condition: sealed, used and tested, untested or for parts.

Read on
Leboncoin, Kleinanzeigen, Wallapop
Priced by
eBay sold index

LEGO

By set number and condition: sealed, opened and complete, or missing parts.

Read on
Vinted, Leboncoin, Wallapop, Kleinanzeigen
Priced by
PriceCharting, eBay
Reseller dashboard

From buy to sold in one account.

Everything you buy with the add-on lands in your inventory. Sold Signal keeps tracking its market price every day and tells you when, and at what price, to sell.

Open the dashboard
ItemBoughtMarket nowProfitAdvice

Example inventory and price history, for illustration.

InventoryEvery purchase with cost, date and where you bought it.
Daily market trackingSold prices updated until the item is gone.
Sell timingList now, you can wait, or sell fast, with a target price.
Profit, ROI and ExcelRecord a sale and profit is calculated. Export everything in one click.
Price alerts

Know when your stock moves.

Set price moves, caps, profit targets and loss warnings on anything in your inventory. When one is reached, you get a message on Telegram, Discord or your phone.

Price change Price cap Profit target Loss warning New high Unsold too long Demand drop Weekly summary

Telegram

A private bot that tells you when something you own moves past the threshold you set.

Sold Signal bot Up 12% in 7 days, Louis Vuitton Speedy 30 Sold median €610, you paid €441 Your alert: up or down 10% in 7 days

Discord

Post alerts into your own server channel, so your group sees price moves at the same time.

#inventory-alerts Above your cap, Charizard PSA 9 Sold median €2,050, your cap €2,000 A good moment to list it

Excel

Export inventory, sales and profit in one click. Columns match what accountants ask for.

ItemBoughtSoldROI Speedy 30420610+23% RTX 3070210285+24% Carhartt85––

Questions resellers ask us.

Everything resellers usually want to know before installing the add-on.

What is Sold Signal?

A browser add-on and a website for second-hand resellers. The add-on puts a badge on every listing and gives a full verdict when you open one. The website tracks what you bought, its market price and your profit once you sell.

Which marketplaces does it work on?

Vinted, Leboncoin, Vestiaire Collective, Wallapop (Spain), Wallapop Italia and Kleinanzeigen (Germany). Every category works on Wallapop and Kleinanzeigen, except luxury bags, which are read on Vestiaire, Vinted, Leboncoin and Wallapop.

Where do the prices come from?

Only from official data: Cardmarket for raw cards, PriceCharting for graded cards and LEGO, and our own index of eBay sales for computer parts and fashion. StockX is added for fashion shortly after launch.

How does condition change the price?

Each listing is only compared with sales in the same condition. Cards use Mint, Near Mint, Light Play, Played and Damaged. LEGO uses sealed, opened and complete, or missing parts. Clothes and bags go from never worn to damaged, and computer parts from sealed to for parts. You can change the detected condition and the verdict updates.

Does Sold Signal tell me if a bag is authentic?

No. It never certifies authenticity. It flags risk signals, such as a missing date-code photo, reused photos or a new account selling far below market, so you know what to ask before buying.

Is my marketplace account at risk?

No. The add-on only reads the page you're viewing and never connects to your marketplace account. There are no bots and no automated browsing.

Does Sold Signal buy items for me?

No. It gives you the information and a max offer. You message the seller and buy on the marketplace as usual.

Which countries are supported?

France, Spain, Italy, Germany, Belgium and Australia at launch, with prices in euros, Australian dollars or US dollars and fees for each local platform.

How much does it cost?

There are three plans: Free, Pro at €9.99 a month and Reseller at €24.99 a month. During the beta, every account gets Pro for free. Compare plans

Still not sure it's for you?

Ask your favourite AI what Sold Signal does and whether it fits how you resell.

Ask ChatGPT Ask Claude Ask Perplexity

We build it with you.

Vote on the next category, report a wrong price, or share a deal you found. The roadmap is public.

Join the DiscordSee the roadmap