5 Red Flags to Watch for When Buying Slabs Online
The graded card market on eBay is mostly legitimate — but fraud exists, and it's getting more sophisticated. Tampered slabs, swapped cards, and fake certs can fool even experienced buyers who rely on photos alone. Here are the five red flags to check before you commit.
Any one of these red flags alone is enough reason to pass or ask the seller for additional photos. Two or more together should be an immediate pass.
Red Flag 1: The Cert Number Doesn't Appear Clearly
Every legitimate PSA, BGS, and SGC slab has a cert number printed on the label. If the seller's photos don't show a legible cert number — blurry, cut off, angled away — that's a red flag. It may be accidental, but it also may be intentional. Use Collect Detect to extract cert numbers even from partial or low-res images.
Red Flag 2: The Cert Doesn't Match the Card
A common fraud involves replacing the card inside a legitimate holder with a lower-grade or counterfeit copy. The slab looks real because it is real — but the card inside has been swapped. Verify the cert, then compare the registered card details (set, year, player/character) against what's shown in the photos. Collect Detect pulls the full cert record so you can cross-reference in seconds.
"The slab is authentic. The card inside is not. This is the fraud most buyers never see coming."
Red Flag 3: Visible Tamper Evidence on the Holder
Look closely at the seam lines on the holder, especially the top and bottom edges. Signs of resealing — slight gaps, uneven edges, residue, or discoloration — indicate the holder was opened and resealed. BGS holders are particularly well-known for being difficult to tamper with, but it happens.
Request a close-up video of all four edges of the holder under bright light. Legitimate sellers with legitimate slabs will always oblige.
Red Flag 4: Price Is Dramatically Below Market
A deal that looks too good usually is. If a PSA 10 Charizard is listed at 40% below the 90-day sold average with no explanation, pause before bidding. Collect Detect's deal scoring factors in this kind of dramatic underpricing — an unusually low price combined with an unverified cert produces a Pass verdict automatically.
Red Flag 5: New Account, No Feedback
Not a cert issue, but worth noting: a seller with fewer than 10 transactions and no feedback on graded cards is a materially higher risk. eBay's buyer protection covers most situations, but disputes are time-consuming. The friction isn't worth it when established sellers with clean track records are selling the same cards.
Your Pre-Bid Checklist
- Pull and verify the cert number using Collect Detect
- Match the cert record to the card shown in photos
- Inspect all holder edges for tamper evidence
- Compare asking price to 90-day sold comps
- Check seller feedback history on graded cards specifically
Most fraud is caught by doing two things: verifying the cert, and comparing the registered card against the photos. Collect Detect does both inline on eBay before you even click through to the listing.