The Collector's Intelligence Platform
The Intelligence platform for collectors who refuse to settle. Search eBay across 15 countries in 8 languages. Track your collection. Verify authenticity. From $9.99/month.
Free to start · No credit card · Mac & iPhone apps coming soon
Authentication by Screen Grade
See verdicts on every signed listing as you browse. No uploads, no waiting. Powered by Screen Grade. Props, costumes, and production art categories coming soon.
Authenticators work from verified exemplars sourced from major auction houses — currently spanning film, television, and streaming. The library grows as new signers come through.
Quick returns a verdict in 24 hours for $8 — the default for most pieces. Rush (9am–8pm PT) moves yours to the front of the queue and returns in 2 hours for $12; outside those hours, your piece queues at 9am Pacific. Deep adds extended exemplar review across a 3-day window for $20, for pieces that warrant the extra read. Same authenticator and verdict canon across all three — you choose the speed and depth.
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 certificate is anchored to independent third-party records the moment it’s issued.
Three Steps
Search signed collectibles on eBay through Grail Den
See an authentication verdict on every signed listing. Powered by Screen Grade
Know what's real before you spend
Your Arsenal
Every module built for obsessive collectors who demand precision, speed, and an unfair advantage.
Grail Den translates your search into 8 languages, searches 15 international marketplaces simultaneously, converts every price to your currency, and surfaces items most collectors never see.
15 Marketplaces · 8 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
Our authenticators calculate value from sold-comp data across major auction houses and marketplace history. Real prices anchored to recent transactions, not list prices.
Authenticator-Calculated Value · Live Auction Tracking
Send Through-The-Mail (TTM) requests to celebrities, athletes, and public figures. Pro subscribers unlock the full curated address index for planning campaigns with confidence.
Pro: 201K+ Addresses · Always UpdatedGlobal 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 14 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, 9am to 8pm 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 DenField Notes
The truth about fake COAs and "premiere signed" memorabilia. Those hologram stickers are worth less than the paper they're stuck on.
ReadAuto-pen machines produce convincing signatures that fool most collectors. Learn the telltale signs.
ReadThat "signed" movie poster might just be a print. How to identify press-signed autographs vs the real thing.
ReadIndependent verification
Every Screen Grade certificate 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 certificate, 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 a certificate number. For high-value items ($2,500+), we recommend pairing with PSA, JSA, Beckett, or SWAU certification.
