The Collector's Intelligence Platform
The Intelligence platform for collectors who refuse to settle. Search eBay across 14 countries in 7 languages. Track your collection. Verify authenticity. Free to start — paid tiers from $9.99/month.
Free to start · No credit card · Web, Mac, and iPhone
Authentication by Screen Grade
Expert verdicts from named authenticators — Quick in 24 hours, Rush in 2. Powered by Screen Grade.
Authenticators work from verified exemplars sourced from major auction houses — currently spanning film, television, and streaming. The library grows as new signers come through.
Understand what you’re buying and what it’s actually worth. Valuations draw on documented sold comps from major auction houses and live marketplace data — so you can read the market before you spend.
A working authenticator with deep experience in entertainment autographs reviews your signature against the signer’s hand on file, paper, ink, and signing era, then issues a numbered, public opinion. The exemplar library currently covers film, television, and streaming, and grows as authenticators encounter new signers.
Built for collectors who want documented evidence, not a sticker. Every opinion is anchored to independent third-party records the moment it’s issued.
Authentication Pricing
A verdict in 24 hours — the default for most pieces.
Front of the queue, typically 2 hours (7am–7pm PT, seven days a week). Outside those hours, your piece queues at 7am Pacific.
Extended exemplar review across a 3-day window, for pieces that warrant the extra read.
Same authenticator and verdict canon across all three — you choose the speed and depth.
See full authentication pricing →
Three Steps
Search signed collectibles on eBay through Grail Den — one search across eBay’s world markets, in your language
Submit any signed listing for an expert verdict from a named authenticator. Powered by Screen Grade
Know what's real before you spend
Your Arsenal
Every module in the Den, built for obsessive collectors who demand precision, speed, and an unfair advantage. Your Den dashboard, in-app messages, and the resources library tie them together.
Grail Den translates your search into 7 languages, searches 14 international marketplaces simultaneously, converts every price to your currency, and surfaces items most collectors never see.
14 Marketplaces · 7 Languages · Auto Currency Conversion
Catalog every piece with photos, provenance chains, and condition grading. Track value over time. Generate underwriter-ready replacement-value appraisals. Know your collection's true worth, always.
Value Tracking · Replacement-Value Appraisals · Provenance Chains
Values come from sold comps across major auction houses and marketplace history, with a signer database of 3,000+ names behind every lookup. Real prices anchored to recent transactions, not list prices.
Value from sold comps · 3,000+ signers · Live auction tracking
Send Through-The-Mail (TTM) requests to celebrities, athletes, and public figures. Scholar members unlock the full curated address index for planning campaigns with confidence.
Scholar: 201K+ Addresses · Always Updated
List and sell to collectors who already know what they are looking at. You stay the seller of record; Grail Den takes 8.5% of the sale as the standard commission, 7.0% for Hunters, 6.0% for Scholars. Every listing can carry a Screen Grade opinion, and the Sales Tracker keeps inventory, the sales ledger, and the profit center in one place.
Direct sales · Sales Tracker · Profit Center
17,000+ signing events on record, refreshed daily from the convention circuit. Watch a signer's name and get an in-app alert when they are announced at a show or signing. Hunter and up.
17,000+ signing events · Daily refresh · In-app alerts
Track consignments and private sales end to end: the deal, the partners, the payments, and a ledger that actually closes. Proposals go out from the tracker and land as deals when they are accepted. Scholar tier.
Deals · Payments · Ledger · ProposalsGlobal Advantage
Your search, translated instantly. “Star Wars signed photo” becomes “Star Wars signiertes Foto” on eBay Germany, “Star Wars photo signée” on eBay France, and “Star Wars foto autografada” on eBay Spain. Over 1,100 collecting terms are protected so franchise names and key terminology stay accurate across every translation.
Most collectors only search eBay.com. They’re missing 13 other eBay marketplaces full of items listed in local languages at local prices. A prop that sells for $800 in the US might be listed for €400 on eBay Italy, if you can find it. Grail Den searches them all at once.
Every result shows the price in your currency automatically. No mental math, no googling exchange rates. See a lightsaber hilt on eBay UK for £350? You’ll see $440 right next to it. Compare across borders as easily as across the street.
The Scholar's Edge
Pro features that give you an unfair advantage in the hunt.
Submit a photo or eBay link. A working authenticator with deep experience in entertainment autographs examines the signature against signer exemplars on file, weighs era and signing context, and issues a documented opinion. Quick (24h), Rush (2h, 7am to 7pm PT), or Deep (3 days, with pen, signature condition, and item condition analysis). Multi-signed pieces priced per name.
Not all sold comps are equal. Statistical filtering separates outliers from true market signals, so you see the real price, not the noise.
Bulk import your collection from eBay purchase history or CSV. Cross-references databases, fills in details, and builds your catalog automatically. Hours become minutes.
What Hunters Seek
Whatever you collect, Grail Den speaks your language.
Choose Your Path
Start free. Upgrade when the hunt demands it.
Free
Start free. Browse and translate the global hunt.
Collector
$99.90/year, save 17%
Member marketplace fee discount on every physical-goods sale. Plus tools to help you find and document pieces.
Pro
$149.90/year, save 17%
The lowest member marketplace fee on the platform for physical-goods sales. Plus all Hunter tools, with no vault cap.
The Den Awaits
Hunt smarter. Collect with confidence. Never overpay.
Enter the DenIndependent verification
Every Screen Grade opinion carries a cryptographic fingerprint hashed to a free, public timestamping service at the moment of issue, then aggregated onto the Bitcoin blockchain shortly after. The anchor can be verified independently — without our database, and without us.
A SHA-256 fingerprint of the opinion letter, anchored to the Bitcoin blockchain. Alter the document and the proof breaks — verifiable independently, without trusting us.
Screen Grade is a working bench of authenticators with deep experience in entertainment autographs. The verdict is an opinion on the record, anchored by an opinion number. For high-value items ($2,500+), we recommend pairing with PSA, JSA, Beckett, or SWAU certification.
