A book seller can scan a hundred spines in an afternoon and have every one of them listed by evening. That part is solved. What is not solved is the shelf of titles bought eighteen months ago at a library sale that have each been viewed twice, priced down three times, and are still sitting there consuming the only genuinely scarce resource in this business, which is space you can reach.
Instica is built around the record rather than the listing. Each title carries what you paid, when you bought it, what condition you graded it at, and how long it has been in stock. That turns "should I keep pricing this down" from a feeling into a lookup, and it is the reason the ledger matters more than the listing tool for anyone working at book volumes.