Three marketplaces,
one searchable shelf.

The problem

Selling across three marketplaces is three times the reach and none of the shopfront. Each app shows a buyer only what is listed inside it, ranks that against everyone else selling the same thing, and takes the relationship with the customer as its fee.

So a seller with real inventory and real regulars had nothing to point either at. Somebody who liked what they bought had no way to see the rest of the stock without being told, by hand, which three apps to go and search — and then searching each one separately.

• No single place to send anyone. Not a link for a bio, a business card, a receipt, or a reply to "what else have you got?"
• The stock was invisible as a whole. Three partial views of one inventory, and no view of all of it — including for the seller.
• Everything was rented. Change the algorithm, change the fees, close the account, and the entire storefront goes with it.
• Nothing was searchable across the lot. A buyer looking for one specific thing had to check three apps and hope.

What got built

One page that is the whole inventory. The three marketplaces sit across the top as cards, each carrying its live listing count, and underneath them is the shelf: every item from all three, in one grid, with filters.

• The shelf is the page. Not a gallery, not a teaser linking off to the apps — the actual combined stock, browsable in one place, which is the thing no marketplace will ever show.
• Filters that match how people shop. Somebody arriving with a specific thing in mind finds it; somebody browsing scrolls. Both work on the same grid.
• Live listing counts on each card. The numbers move with the stock, so the page can't quietly become a museum of things that sold last spring.
• Every item still checks out where it lives. The sale, the payment and the buyer protection stay on the marketplace that already handles them. Rebuilding that would have been a worse product at ten times the price.
• Phone-first. Resale browsing is a thumb on a sofa, not a desk. The grid was designed at that width first.

What changed

No sales or traffic numbers here — those are the client's, not mine to publish. What follows is what is demonstrably different about the thing itself.

• There is one link now. One address that answers "what else have you got?" completely, and it goes in a bio, on a card, in a reply, on a receipt.
• The whole inventory is visible in one view — to a buyer, and to the seller, who could not see it in one place either.
• It is searchable across all three, which is precisely the thing none of the three will do, because doing it would send you to the other two.
• The counts stay honest. They follow the listings rather than a number somebody remembers to edit, so the page ages with the stock instead of against it.
• The address is owned, not rented. Fees change, algorithms change, accounts close — the shelf and the domain are theirs, in their name.