If you dont have a Basic Pokmon in your deck, show your hand to your opponent and shovel it back in your deck
Always insist on a public, safe location for in-person trades and verify the cards authenticity (use a grading companys database!) before finalizing the sale
There's some upside here if you end up pitching the card you just tutored, though as with Gamble, the best bet is to search for a card that works just as well from the graveyard as it does in your hand
Not only that, but you can add a loyalty to allow you to cast sorcery spells as though they had Flash until your next turn, and remove three loyalty to allow you to return an artifact, creature or enchantment to its owner's hand, before drawing a card
Professional Sports Authenticator (PSA) is arguably the most popular and well-known, and their graded cards often command the highest prices on the secondary market