## What eBay to eBay arbitrage actually is
eBay to eBay arbitrage is buying an item on eBay for less than it is worth, then relisting it on eBay at the market price. The gap exists because eBay is not one market with one price. It is millions of individual sellers, and plenty of them have no idea what their item goes for.
Someone clearing out a garage lists a discontinued LEGO set with a blurry photo and the title "lego bricks toy". It sells for £15. The same set, listed properly with the set number in the title, sells for £45. The person who spotted that gap made the difference, minus fees and postage.
It is the same skill as eBay arbitrage in shops. The only change is where you source. Instead of scanning shelves in a clearance aisle, you are hunting badly listed items on the platform itself.
Is it allowed?
Yes. Buying an item, receiving it, owning it and then reselling it is ordinary trading. eBay has no rule against selling something you originally bought on eBay, and no rule that says you must sell above or below any particular price.
The policy people worry about is eBay's dropshipping policy, and it covers something different. What eBay restricts is listing an item you do not own, waiting for it to sell, and then buying it from another retailer or marketplace to ship directly to your buyer. That model puts your account at risk.
So the line is simple:
- Allowed: buy the item first, take delivery, then list and post it yourself. You own the stock. This is normal reselling.
- Against policy: list an item you have not bought, and only purchase it from another retailer after your buyer pays.
If you buy first, you are on the right side of the line.
Where the mispriced listings hide
Underpriced listings share a pattern. The seller either does not know what they have, or has made the item hard to find. Look for:
- Bad titles. Vague words, no brand, no model number, misspellings. "Old camera" instead of the model name. Search engines cannot surface what the title does not say, so fewer buyers see it and the price stays low.
- No barcode or item specifics. Listings created without the product identifier do not get matched to the catalogue, so they miss buyers searching by product.
- Poor photos. One dark photo taken on carpet suppresses bids more than almost anything else.
- Auctions ending at odd hours. An auction finishing at 4am on a Tuesday has far fewer people watching the final minutes than one ending on a Sunday evening. Fewer last minute bidders means a lower final price.
- Job lots and bundles. Sellers bundling items to shift them quickly often price the lot below the value of one or two pieces inside it.
The work is checking what the item is really worth before you commit. That is where an eBay barcode scanner earns its keep: if the item has a barcode in the photos or the listing, you can pull up the live eBay market price and the fee adjusted profit in seconds instead of doing manual sold searches.
The margins after fees
Your margin depends heavily on which type of seller account you sell from.
Private sellers in the UK have paid zero eBay fees on domestic sales since September 2024. If you are selling off items in modest volume as a private seller, the gap between your buy price and sale price is yours, minus postage.
Business sellers pay a final value fee that varies by category, around 10.9 percent for most categories, plus a 0.35 percent regulatory operating fee and a fixed per order fee of £0.30 on orders up to £10 or £0.40 above that. Payment processing is already included in the final value fee, so there is nothing extra for card handling.
Here is a worked example. You buy a mispriced item for £12 and relist it at its market price of £30, paying £3 to post it.
| Private seller | Business seller | |
| Sale price | £30.00 | £30.00 |
| Final value fee (10.9%) | £0.00 | £3.27 |
| Regulatory fee (0.35%) | £0.00 | £0.11 |
| Per order fee | £0.00 | £0.40 |
| Postage | £3.00 | £3.00 |
| Buy cost | £12.00 | £12.00 |
| Profit | £15.00 | £11.22 |
One caution on the private route: buying specifically to resell at a profit is trading, and HMRC and eBay both treat it that way. Do it seriously and at volume and you belong on a business account. The full breakdown by category is on our eBay fees page.
The risks nobody mentions
eBay to eBay arbitrage has costs that shop sourcing does not.
- Double shipping. The item is posted twice, once to you and once to your buyer. You pay for the inbound leg either directly or inside the price. On low value items this quietly eats the whole margin.
- Condition surprises. The blurry photo hiding the bargain can also hide a crack. You inherit whatever the first seller failed to mention, and your buyer will hold you to your own listing's description.
- Returns cut both ways. If your buyer returns the item, you own it again at your buy price plus two lots of postage.
- Selling limits. New and low volume accounts have monthly selling allowances. A sudden jump in listings can bump into limits or trigger a review, so scale gradually.
- Time lag. Between winning the item, waiting for delivery and relisting, the market price can move. Fast selling items with stable demand carry less of this risk than speculative ones.
None of these kill the model. They just mean the gap between buy price and market price needs to be wide enough to absorb them. A £3 gap is not a margin. A £15 gap on a £30 item is.
A step by step workflow
- Pick a category you know. Depth beats breadth. Knowing what a LEGO set, a printer model or a discontinued fragrance really goes for is the entire edge.
- Search badly. Search the misspellings, the vague titles and the wrong categories, because that is where the mispriced stock sits. Filter auctions by ending soonest and scan the ones finishing at unsociable hours.
- Check the real market price before bidding. Scan or type the barcode into ScanJunki and you get the live eBay price range, how many sellers are competing and your profit after the correct category fees. If there is no barcode, check sold listings for the exact model.
- Set a maximum buy price and stick to it. Work backwards from the market price: subtract fees, both postage legs and the profit you want. The number left is your ceiling.
- Buy, receive and inspect. Confirm the condition matches before you relist. If it does not, the original seller's returns process is your protection.
- Relist properly. Full title with brand and model number, the barcode in item specifics, clean photos on a plain background. You are fixing exactly the mistakes that made the item cheap.
- Track every deal. Buy price, both postage costs, fees, sale price. The spreadsheet tells you which categories actually pay after everything, and gut feeling reliably lies about this.
The short version
eBay to eBay arbitrage is legitimate as long as you buy the stock before you list it. The profit comes from finding items that are hard to find, then relisting them so they are easy to find. Private sellers keep the whole gap on domestic UK sales, business sellers give up roughly 11 to 12 percent, and double postage is the cost that catches people out.
The maths has to be done before you bid, not after. ScanJunki is completely free right now, so you can check any barcode against live eBay prices with fees already worked out, no card needed.