Nimble Trapfinder has a nice card advantage effect in a Constructed party deck
Most people arent out here spending nearly $1 million on a single card, though
This typically means mana-acceleration effects that will help you produce eleven mana naturally for someone like Ulamog, the Infinite Gyre when you can't bring him to class for Show and Tell
In other TCG-related news, check out the Radiant Alakazam card from Incandescent Arcana [S11a]
If you do have $400 to spare, you could buy a high quality home printer, good quality card stock, a pair of scissors, and have funds left over to buy a booster box of Thunder Junction from your friendly local game store to run a draft with your friends
This card remains a popular pick among collectors exploring the op 08 card list