New17 Sept 2026
Most hunted
A public board of the books members are hunting right now, by community, and a thread on every book. Say which printing to avoid, or that you found one.
See the board Scanning live right now
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Books in our catalogue
Stop refreshing eBay. Start finishing your collection
ShelfKeepr scans every marketplace we cover around the clock - more often for the rarer books - and emails you the moment a copy matches your price and condition. Every provider, on every tier, free included.
A used copy typically costs about 60% less than a new one. Find one book and the month has paid for itself.
- Free on Watcher
- No card needed
- 200+ collectors already hunting
Match Found live
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The Hobbit
J.R.R. Tolkien
Price
$12.50
Condition
Very Good
Source
eBay US
Good Omens
Scanning eBay and Etsy… checked 4 min ago
Searched on every tier
Steal of the month
Found by the hunt. Bought for a lot less
One member's purchase this month, next to what the same book was fetching everywhere else at the time. Real listing, real price, no rounding in our favour.
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69% underConfirmed by the marketplace
Legion· Dan Abnett
Paid
$20.00
Going rate
$64.99
Saved
$44.99
8 prices other members saw, $25.00 to $71.99
Acceptable · eBay · found in 2 days · United States member
Also found this month
- A
A Thousand SonsGraham McNeill · Good · eBay£16.15£29.82· 46% under - K
Know No FearDan Abnett · New · eBay£8.09£14.54· 44% under - A
A Thousand SonsGraham McNeill · Good · eBay£26.70£38.65· 31% under - T
Tales of HeresyNick Kyme, Lindsey Priestley · Good · eBay£16.15£18.07· 11% under
New on ShelfKeepr
What's new
Features as they land, newest first. Nothing here is a promise, all of it is live.
15 Sept 2026
Steal of the month
The month's best confirmed buy against what everyone else was seeing for the same book, on the homepage and at the top of your dashboard.
This month's stealPick your tier
One tier to watch. One to hunt
Every marketplace we search is searched for everyone, free tier included. What you pay for is how many books you can chase, how often we go back for them, and how hard we filter.
Watcher
Free
Free forever. No card needed.
- Books on the hunt: 1
- A wish list of 10 books: one hunting, the rest queued to swap in
- Catalogue your whole collection
- Every marketplace and dealer we search
- A last copy checked every hour, through the night
- Immediate notifications when a copy matches
- Seven filters on every listing, so you only see the book
- Price limit and condition filters
Most popular
Hunter
$3.99/month
Billed monthly · cancel any time
Everything in Watcher, plus:
- Books on the hunt: 100
- Very rare books are checked every 30 minutes - 48 times a day, 1,440 a month
- Uncommon books are checked hourly and common books every four hours
- Choose your filters: signed, first edition, hardback, illustrated, annotated
- Cancel whenever you like. Your shelf stays yours
- 14-day cooling off period if you change your mind, for a full refund
How often we check
Set per book by how many copies are listed.
Watcher HunterLast copy1 hr30 minScarce2 hrs1 hrUncommon8 hrs4 hrsPlenty around12 hrs6 hrs
Last copy
Scarce
Uncommon
Plenty around
Watcher
Every hour
Every 2 hrs
Every 8 hrs
Every 12 hrs
Huntertwice as often
Every 30 min
Every hour
Every 4 hrs
Every 6 hrs
Hunter checks every band twice as often.
How the hunt works
You add the books. We do the rest
The Hobbit — first edition…ISBN
T
The Hobbit
J.R.R. Tolkien
T
The Hobbit — Hardback
J.R.R. Tolkien
T
The Hobbit (Signed)
1st Print · Rare
Step 01
Add the books you're hunting
Search by title, author, or ISBN. Set your condition preference and a max price.
WatcherHunterLast copy1 hr30 minScarce2 hrs1 hrUncommon8 hrs4 hrsPlenty around12 hrs6 hrs
Step 02
Our algorithm hunts harder for rarer books
Every book gets its own schedule, set by how many copies are listed. Watcher checks a last copy every hour. Hunter checks it every 30 minutes - 48 times a day, per book, right through the night.
S
ShelfKeepr
just now
American Gods found
$9.25
Good+ · eBay US
The Silmarillion · searching…
Nineteen Eighty-Four · searching…
Step 03
Get notified
The moment we match your search, we email you a link direct to the listing.
Missing from the catalogue?
Add any book yourself, in seconds
Our catalogue is large but it is not everything - small presses, foreign printings and brand-new releases slip through. Type the ISBN and the book is in. No ISBN printed on it at all? Type what is on the cover instead. No request form, no queue, nobody at our end to wait for.
- 1ISBN978-0-261-10221-7Look it up
Type the ISBN
The 13 digits off the back cover or the copyright page. Special editions and small-press printings often carry none - say so and you fill in the cover details instead.
- 2The HobbitJ.R.R. TolkienPaperback - 1991HarperCollins
Found via ISBNdb. Confirm to add it to the catalogue.
Add to catalogueCheck it is the right book
We look it up and show you the cover, edition and publisher before anything is added, so a mistyped digit never becomes a wrong hunt.
- 3Added to your catalogueThe HobbitNow hunting - first search running
Start hunting it
Confirm and the book joins the catalogue there and then - ready to track, with its first search running immediately.
A book with an ISBN carries the identifier the marketplaces match on; one without is hunted by its title, author and edition. Either way, once it is in, it is in for everyone.
Why not just check yourself?
Because it isn't one search a day. It's 181, per book
Checking the marketplaces once a day feels like enough. It can be, until the copy you want turns up on a morning you're busy.
- 1,440 checksa month, on one rare book
- A book down to its last copy is checked every 30 minutes on Hunter. 48 times a day, right through the night. Watcher checks that same book 24 times a day.
- 181 searchesa day, for that one book
- A check isn't a search. It runs on eBay in your own market and on Etsy, on the title, the ISBN and the book's other printings. Measured 13 September 2026 - about four and a half eBay calls and one Etsy call, every check.
- 99 termsbinned before you see them
- Badges, mugs, keyrings, figures, dice, board games, plush, audiobooks, CDs, download codes, magazines. Then job lots, bundles, listings outside the books tree, wrong-language editions, and "Dune 2" when you asked for "Dune".
You stop watching the marketplace. We don't.
Why it finds more, for less
One place, one search
Match found Not this one
The Great Gatsby
F. Scott Fitzgerald · Paperback
Matched eBay US listing
Price
$6.92
Condition
Very Good
Source
eBay US
Your hunt · No limit · Any condition · Any copy
Sold by riddellmethat
Cheapest copy of this exact edition — matched by ISBN. Other editions may be cheaper.
Cheaper — different edition Not this one
$4.00Very GoodSold by mfheslam15
Same title and author, but not the ISBN you're tracking — likely another printing or publisher.
Already purchased Dismiss
Brave New World
Aldous Huxley · Hardback
Matched eBay US listing
Price
$8.99
Condition
Good
Source
eBay US
Your hunt · No limit · Any condition · Any copy
Sold by big4northeast
Another ShelfKeepr user bought this copy. We've started a new search - dismiss this to clear it.
48×a day, on a last copy
Elusive books get hunted harder
Every book gets its own schedule, set by how many copies are listed. On a last copy, Hunter looks every 30 minutes - 48 times a day, per book. Where there are plenty around, every 6 hours is enough. The attention goes where the copies are scarce.
1,440searches a month, on one rare book
It never gets bored of looking
A book down to its last copy is checked 48 times a day - overnight, at the weekend, on the morning you are too busy to look. Over a month that is 1,440 goes at the same book. Nobody sustains that by hand, and that is the whole point.
We show you cheaper editions too
When a different edition undercuts the one you asked for, we show you both - same title and author, different printing. Your call, not ours.
No chasing copies that have gone
If another ShelfKeepr user buys a copy you were matched to, we tell you and start looking again immediately.
We tell you how sure we are
Every result says how it matched: exact ISBN, or title and author.
Incorrect match?
Listings aren't always right. We can't fix that, but you don't need to see the same one twice. Dismiss it and it's gone from your results for good.
The junk never reaches you
Merch, bundles, audiobooks, wrong-language printings, the wrong volume of a series. Seven checks run on every listing before one is allowed to reach your inbox.
Bought it? One tap and it's shelved
Mark it as bought and the copy moves to your shelf. One hunt down, and a slot back for the next.
One search covers every user tracking the same book, so the effort goes into watching more titles rather than repeating the same lookup.
Dashboard preview
Your entire hunt, at a glance
Every book you're tracking, every match, every purchase - all on one page.
shelfkeepr.com/dashboard
Your Want List
7 books tracked · 2 matches this week
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To Kill a Mockingbird
Harper Lee · eBay US
$12.50View →
T
The Catcher in the Rye
J. D. Salinger · eBay US
$8.00View →
D
Dune
Brian Herbert · Scanning…
Searching
N
Neuromancer
William Gibson · Purchased 12 Mar
Owned
Already own it?
Catalogue and organise your collection
Search the catalogue…
G
Good Omens
Neil Gaiman
A
American Gods
Neil Gaiman
T
The Silmarillion
J.R.R. Tolkien
Step 01
Want to organise your existing collection? Add it to your shelf
Search the catalogue, add what's already on your shelf. You'll see what you've got, and what you haven't.
First editions5 books
Modern classics3 books
Science fiction3 books
Step 02
File it into a collection
Group books by series or author. Nest collections inside collections. However your shelf works in your head, it can work that way here.
My Shelf106 books
G
A
Step 03
See it all, at a glance
Collapse complete or idle collections. Sort A–Z, or by what you added last. Shelves keep growing, so keep yours manageable.
What Hunter actually buys
The same providers. A great deal more searching
Every marketplace we search is searched on every tier, free included. Hunter buys the volume, the speed, and the filter that keeps the rubbish out of your inbox.
100 books, hunted at once
A whole want list rather than one title at a time. Every book carries its own price limit, condition and must-be filters.
1,440 checks a month, per book
A book down to its last copy is checked every 30 minutes, 48 times a day, right through the night. You would have to set an alarm.
The junk never reaches you
99 excluded terms, five bundle patterns, a books-category check, a language check, a sequel-number check, an author check and a shipping check. Every listing clears all of it first.
Want to become a provider?
If you run a marketplace, a dealer network or an affiliate programme and want your stock searched for our members, tell us about it.
Every marketplace we search is searched on every tier, free accounts included.