Built by running a real reselling business
Photograph an item and it comes back identified, priced against real completed sales, and written up — a median of 19 seconds, measured across 1,046 single-item researches. Then it goes to every channel you sell on at once, instead of the same form three times.
Not open for signups yet. One operation runs on it today — 462 items, 136 sales, and every fix below found the expensive way.
What those seconds are spent on. Blending graded and raw sales would have priced this card at $25.24 — a number at which neither version of it sells. Fast is only worth something if the answer is right. Listing titles here are representative; the figures are the ones production returned.
Not a demo dataset. These are the operating numbers of the reselling business the software runs, built and used daily between April and August 2026.
The job today
And half of them are a different edition, generation, or condition of the same product. Price too high and it never sells. Too low and the margin is gone.
Every marketplace has its own form, category tree, and required fields. Listing one item in three places is three times the work — so most sellers list in one and accept a smaller pool of buyers.
The channels don't talk to each other. Selling the same unit twice costs a refund, a damaged account metric, and the customer.
Platform fees, shipping, and what you actually paid live in three different places — or nowhere at all. Most sellers cannot tell you their real profit.
One system, acquisition to accounted-for profit
BayBrain identifies the item, researches what it genuinely sells for, drafts the listing, publishes it to every channel you use, keeps stock synchronized so one unit cannot sell twice, buys and prints the label, and reports what you earned.
These are listed separately on purpose. They are engineered and covered by tests, but they have not carried real money yet, and saying otherwise would be the same kind of guess this product exists to avoid.
Found in production, against real inventory
Each was diagnosed, corrected, and locked in with a regression test so it cannot come back. This is the part that cannot be designed in advance — only discovered by running a real business on the software.
| Item | What it would have priced at | Corrected |
|---|---|---|
| Collectible figure set | No usable comparable sales — priced off other sellers' asking prices | $76.60 · 20 verified sales |
| Graded trading card | $25.24 — graded and ungraded sales blended together | $69.95 |
| Graded trading card | $21.00 from a single unrelated sale | $69.99 · 19 verified sales |
| Four-item electronics lot | $17.95, with only one of the four items priced at all | $145.08 · all four, ~25s |
| Collectible action figure | $69.99 from one incorrect match | $54.00 · 4 verified matches |
| Die-cast collectible | No usable match found | $30.99 · 4 exact matches |
| Raw comic book | Priced against professionally graded copies | $459.50 · raw copies only |
Why this is hard
The difficulty was never the lookup. It is knowing which of those sales is the same product as the thing in your hand. BayBrain treats that as the first question, not an afterthought.
Visual checks confirm a comparable sale really shows your product. Just as important is knowing the categories where photos actively mislead — a slabbed card, a stick of RAM — and not trusting the picture there.
Where the evidence is thin or contradictory, you get "not enough evidence" instead of a plausible-looking number. A wrong price you trust is worse than no price at all.
Early access
BayBrain runs one operation today. Opening it to other sellers is the next piece of work, and the people on this list get first access and set the priorities. No newsletter, no drip sequence — one email when there is something to use.