If you get three heads, you can draw three cards
Without a haste enabler, it attacks as early as turn 3, either as a 2/4 or a 1/3 in the air, depending on whether you give it the counter or make a Spirit
This lets you reliably start cheating in overcosted creatures sooner, potentially dropping two on turn four, when Sneak Attack would only just be coming online
The sale page doesn't specify what flaw the card has, but pokemomster_og says "I've collected since 1999 and this has been one of my most cherished cards." "I've taken great care of this card for over 20 years, and the grade shows it", they add
These monsters can then be used as materials or tributes and instead of going to the Graveyard, they'll be put back in the deck, giving the player another chance to use them