Pricing
Every tier catalogs your whole collection — no limits on books, ever. Paid tiers add signal slots and faster digests.
A signal slot is one book you're watching. Arm it and we tell you when its value moves, a catalyst hits, or a sale lands.
Start for free
Your whole collection, cataloged forever at no cost — no book limits, ever. Import in minutes, get your Five-Minute First Report, arm 3 signals, and receive the monthly digest. $0, no card.
Founding memberships
Annual only, priced for life — your rate never changes as long as you stay — with doubled signal slots forever. Strictly limited.
Founding Collector
$79/yr, locked forever
- Everything in Collector
- 50 signal slots — double Collector, for life
Founding Signals
$149/yr, locked forever
- 500 signal slots — double Signals, for life
- Daily digest
- The Signals toolkit: grade ladder with press-and-grade ROI, your personal movers, custom indexes, the estate & insurance report, venue routing, and your own data API — all live today
- Deal finder, the moment eBay approves our access
Standing plans
Monthly or annual. Upgrade or downgrade anytime.
Collector
$9.99/mo
or $99/yr — two months free
- Everything in Free
- 25 signal slots
- Weekly digest (or slower, your call)
- Net-if-sold on every valued book
Signals
$19.99/mo
or $199/yr — two months free
- Everything in Collector
- 250 signal slots
- Daily digest (or slower, your call)
- Catalyst alerts across your shelf
About the numbers. A verified value comes only from dated sales we can show you. There are few of those today — they grow as sale sources come online. Everything else is modeled, with its confidence shown beside it, or none. We never show a number we can't explain.
Cancel any subscription anytime; see the refund policy. Values are estimates, not financial advice — how our numbers work.