Mercari: Your Marketplace, Mercari
Launches Authentication On All Watches Sold for $2,000 or More in the US with New Service, “Authenticity Guarantee”
It's Easy to Buy a Fake Rolex and Gucci Bag on Facebook Marketplace
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StockX: Sneakers, Streetwear, Trading Cards, Handbags, Watches
Authenticity Guarantee for Trading Cards
Tutorial] How to Search for Graded, Reviewed, and Aftermarket Autographs on the COMC Marketplace
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Authenticity Card (Only for Marketplace Customers)
mails postcards to sellers to verify whether their addresses are real
Selling & Shopping Online on the App Store
3 Pokémon Card Vmax Bundle - 1 Secret Rare Rainbow Card - No Duplicates - Vmax Booster Pack : Toys & Games
Selling an item on online marketplace platforms? Beware of this ongoing scam. - NCC