A resale value scanner has about ten seconds to work, because that’s how long the person selling you the thing will wait. You’re standing in a driveway holding a drill. They want $40. You either know what it sells for after eBay’s cut and the box it ships in, or you’re guessing with your own money.
Every research tool we’d built before this one answered a different question — what should I go and buy? — and answered it at a desk, with a keyword, over minutes. So we built Snap & Source: paste the link, take a photo, or type what it is, and get one word back. Below is what it actually returns, including the two cases where it tells you it doesn’t know.
What a resale value scanner has to tell you
Not “this sells for $65.” That number is useless on its own — it doesn’t survive eBay’s fees, and it doesn’t tell you what to say when the seller is waiting for a number.
Four answers come back, collapsed from the same profit tiers the rest of the app uses: BUY, CLOSE CALL, PASS, and CAN’T PRICE IT. Underneath sits the one figure you actually act on — pay up to — plus the resale price, the break-even, and how long the money takes to come back.
That’s a DeWalt DCD771 at $40, priced off 20 sold comps in 0.4 seconds. Read it right and it’s not a yes or a no, it’s a negotiating position: the drill is worth having at $31.69, and above $56.69 you are paying eBay for the privilege of storing it.
The number that matters is “pay up to”, not “sells for”
Break-even is where the profit hits zero — every fee, plus the shipping the matched comps actually charged. But nobody sources at break-even. You have a bar: some minimum profit, some minimum return, below which the item isn’t worth fetching, photographing, listing and packing.
So the app solves it backwards. Below break-even, profit at a buy price p is break-even − p, and ROI is (break-even − p) ÷ p. Set each of those equal to your bars, solve for p, take whichever comes out tighter, and floor it to the cent — because a number quoted as safe has to be safe at the number quoted.
On the drill above, with a $25 minimum profit bar, that lands at $31.69. Pay that and you clear $25 after everything. It’s arithmetic, not a hunch, and it’s the same fee model the repricing scan uses to cost an item, so a snap and a board row for the same item can’t disagree.
The case no other tool answers: nobody has named a price
Every research board starts from an ask. At a yard sale there isn’t one. Nothing has been said yet, and the first person to say a number usually loses.
Leave the price blank and the verdict changes shape entirely:
Notice what’s missing. The priced version showed “profit at $40.00 — $16.69, 42% ROI.” Here those tiles are dropped. The row is still costed internally, so the arithmetic exists — but a profit figure calculated against a price nobody has offered you is the most flattering lie this screen could tell, so it doesn’t print one. You get a walk-away number and nothing else.
Why it isn’t a barcode scanner — and when a barcode scanner is better
Most things sold as a resale value scanner are barcode apps: point at a UPC or an ISBN, hit a catalogue, get an exact match. If you’re working a Walmart clearance endcap or a book sale, that is genuinely the better tool — ScoutIQ and the Amazon Seller app will beat this on both speed and accuracy, because an exact catalogue match is worth more than any amount of clever matching.
We didn’t build one because the stuff we buy has no barcode worth scanning. A twelve-year-old drill with the sticker rubbed off, a server pulled from a rack, a pallet of mixed returns, an ASIC miner in somebody’s garage — no box, no UPC, and often no visible model number at all. What that item does have is a shape you can photograph and a listing the seller already texted you. That’s what goes in.
Three ways in, and the third is the correction path: the identified name renders as an editable field, so when the app calls your drill the wrong model you fix the words and re-price. Re-pricing a corrected name deliberately doesn’t re-send the photo — you’ve already told it what the thing is.
What it looks like when the tool is wrong
This is the part most product pages leave out, so here it is with the numbers on screen.
An Antminer S19j Pro 104TH does not sell for $85. It sells for a great deal more than that, which is a thing we can say with some confidence because this is the hardware we move — 18 whole S19j Pro units in the same database carry a median of $117.50, about $1.13 per terahash. What happened is that the comp matcher pulled 17 sold records and not one of them carried the model or part number — almost certainly power supplies, hashboards and fans rather than whole units. Everything downstream of that bad basis is then perfectly consistent nonsense: $85 resale, $72.76 break-even, PASS at $950.
The thing worth paying for is the amber badge. THIN — “not one of the 17 sold comps carries this item’s model or part number, so the resale price behind these percentages is another product’s.” The app grades its own evidence and tells you when the number under the verdict is borrowed from something else. Read that card correctly and it doesn’t say “walk away from the miner.” It says “I don’t know what this is worth, go and read the sold listings.” There’s a button on the card that does exactly that.
Comp matching is the hard part of every research tool, ours included, and we’ve written up where sold-comp analysis breaks down in more detail. A tool that hides a weak match behind a confident number is worse than no tool.
The other honest answer is blunter:
Plenty of tools would have produced a number there. An empty answer is the correct one — there’s a live eBay sold-history market for R730s, our matcher just didn’t find it from that title string, and inventing a price to fill the card would be the single most expensive thing this screen could do.
The limits, stated plainly
- It prices the item, it can’t inspect it. Nothing here sees a cracked screen, a missing charger, water damage or a counterfeit. A photo verdict is a price on what the app thinks it is — read the identified name before you trust the number.
- Link reading depends on the site publishing metadata. The parser reads declared fields only (Open Graph, JSON-LD, and Craigslist’s own price element), never scraped body text, because a price lifted off a “customers also bought” tile produces a confident BUY on a deal that doesn’t exist. A site that declares nothing routes you to the photo instead.
- Some listing sites refuse a plain client outright. Craigslist’s RSS, eBay search and B&H all returned 403 during testing. That’s exactly why the camera route exists — no CDN can block a photograph.
- Bot-check pages once got priced. A Walmart challenge page returned HTTP 200 with a full set of Open Graph tags, and the screen cheerfully priced an item called “Robot or human?” Nothing failed, so no status-code check would have caught it. Challenge titles are now detected and route to the photo path.
- A snap never triggers a Terapeak scrape. A real scrape means a browser page load against a logged-in session, and this screen exists to answer before the seller gets bored. It runs off the hosted comps corpus alone — so the same item can come back thinner here than on a board that was allowed to spend the time.
- It’s read-only. Nothing on this screen buys, bids, lists or messages anyone. It’s a calculator with a camera on the front.
Where it fits with the rest of the sourcing tools
Snap & Source is the field version. The desk versions are still the better tools when you have time: the Opportunity Finder ranks live listings by profit against sold comps, the live-auction board prices a lot while the show is still running, and the auction bid calculator answers the same “how much should I pay” question against eBay’s own auctions, where you have days rather than seconds. Same pricing engine underneath all three — the difference is how long you’ve got.
The five verdicts shown on this page came back in 0.4 to 1.7 seconds each; the app stamps the elapsed time on every card, which is how those figures are known. It’s part of the free beta of ING Listing Engine, along with the AI listing writer, the repricer and the rest of it — no paywall, no feature tiers. Windows, and it runs on your own machine against your own eBay account.
Common questions
What is a resale value scanner? A tool that takes an item you are standing in front of and tells you whether buying it to resell would make money. The useful ones do not stop at the resale price: they subtract the marketplace fees and the shipping, then give you the highest price you can pay and still clear the profit you insist on. Most products sold under this name are barcode scanners that read a UPC or ISBN; Snap & Source instead takes a photo, a pasted listing link, or a typed product name, because second-hand goods usually have no barcode left to scan.
How do I know if something is worth buying to resell? Work backwards from the sold price, not forwards from the asking price. Take what the item actually sold for on eBay recently, subtract the final value fee and the real shipping cost to get break-even, then subtract the minimum profit you will accept. What is left is the most you can pay. If the seller’s asking price is above that number, it is not a deal no matter how far below retail it looks.
Can you get a resale value from a photo? You can get an identification from a photo, and a price from that identification. That is not the same as a price from the photo. Nothing in the image tells the tool whether the screen is cracked, the charger is missing, the battery is dead or the item is counterfeit, so a photo verdict is a price on what the software thinks the item is. Read the identified name before trusting the number — in Snap & Source that name is an editable field for exactly this reason.
What should I do when the scanner has no sold data? Treat an empty answer as better information than a confident one. When no sold comps match the title, Snap & Source returns CAN’T PRICE IT and shows no estimate rather than inventing a figure. It also grades weak matches: a THIN badge means comps were found but none carried the item’s model or part number, so the resale price behind the verdict belongs to a different product. In both cases the answer is to open the sold listings and look.
What if the seller hasn’t named a price yet? Leave the price field blank. Snap & Source then returns a ceiling instead of a verdict — for example BUY UNDER $32 — and deliberately drops the profit and ROI figures, because profit calculated against a price nobody has offered you is not information. It also distinguishes an item that clears nothing even free from one with too little headroom to be worth collecting, photographing, listing and packing.
Is a barcode scanner better for retail arbitrage? Yes, for new retail stock. If you are working a clearance aisle where every item is boxed and catalogued, a barcode app such as ScoutIQ or the Amazon Seller app will beat a photo-based tool on both speed and accuracy, because an exact catalogue match beats any amount of inference. A photo-and-link tool earns its place on used goods — no box, no UPC, often no visible model number.
Filed under Pricing & Profit · Tagged Fees & margin, Sold comps, Photos & vision AI, ASIC miners · Browse all guides by topic