I rip into them gleefully, greedily
Many of the major grading companies, such as Professional Sports Authenticator (PSA) and Beckett, have a booth at conventions or trade shows for collectors to authenticate your cards
It also might make the cut in some versions of Edgar Markov Vampire Tribal as some of the better Vampires in the deck happen to be Clerics (Vito, Thorn of the Dusk Rose), Wizards (Bloodline Necromancer), Warriors (Kalitas, Traitor of Ghet), and Rogues (Nighthawk Scavenger), though admittedly there aren't many per category so I wouldn't expect more than 1 to be on the battlefield when you want to cast Zagras, Thief of Heartbeats
The highlight of the comment is easily "easy to wring a cards worth of value out of it"
It doesn't have to be your own character, either
Yes, any part of your head will work