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The eBay Power Seller: How Verified Provenance Changed the Numbers
A high-volume graded card seller reduced dispute rates by 60% and increased average sale price — here's how.
About This Use Case Composite of SlabProof Verified Dealer pilot program participants. Names and specific identifying details have been changed. The outcomes described represent actual pilot program results.
Background A high-volume eBay seller specializing in PSA and BGS graded sports cards — operating under the seller handle 'VaultCard_Pro' — came to SlabProof's Verified Dealer pilot program with a specific problem: a dispute rate that had been climbing for 18 months, driven by buyers filing 'item not as described' chargebacks after receiving legitimate, accurately-listed cards.
Monthly volume: approximately 60-80 graded card transactions. Average sale price: $450. Dispute rate: 8.2% — significantly above the eBay category average and affecting seller status.
The Problem The dispute rate wasn't driven by seller fraud. The cards were authentic, accurately graded, and honestly listed. The problem was buyer-side chargeback fraud combined with genuine buyer anxiety about fraud risk in the market.
Buyers were increasingly nervous. They'd receive a real PSA 9 Jordan rookie that I'd accurately listed, and then file a chargeback claiming it wasn't as described. Some of them genuinely couldn't tell the difference between my authentic card and the fakes they'd heard about. And some of them were just committing chargeback fraud.
Both problems had the same root: no documented evidence of the card's provenance and condition at time of sale.
The SlabProof Implementation The seller registered all existing inventory on SlabProof — approximately 200 slabs — using the Verified Dealer bulk registration tool. Each listing was updated to include: - The SlabProof ID in the listing title and description - A direct link to the public provenance page - The SlabProof Verified badge in the listing images - Language explaining what SlabProof verification means
For new acquisitions, registration became part of the intake process — every slab was registered within 24 hours of purchase, before listing.
What Changed ### Buyer Behavior Buyer questions shifted immediately. Instead of 'how do I know this is real?' messages — which previously came in on 30-40% of high-value listings — messages shifted to 'I checked the SlabProof record, looks good, can you ship to Canada?' The pre-sale anxiety conversation was replaced by a post-verification confirmation conversation.
Dispute Rate Over the following 90 days, the dispute rate dropped from 8.2% to 3.1% — a 62% reduction. The remaining disputes were all buyer-side fraud, but with SlabProof's timestamped registration records and provenance documentation, dispute resolution became significantly easier. eBay's dispute process gives weight to documented provenance in item-not-as-described claims.
Average Sale Price Average sale price on SlabProof Verified listings increased 12% relative to the prior 90-day baseline on equivalent cards. The seller's interpretation: 'Buyers were willing to pay more when they could verify. A clean provenance record turns a commodity listing into a verified listing.'
What the Seller Says Now > The $29.99 a month pays for itself on a single prevented dispute. Everything else is upside.
The seller is now one of SlabProof's most active advocates in the eBay graded card seller community, frequently mentioning SlabProof Verified status in seller forums and Discord channels where serious card sellers operate.