Hey man,
WOCLCOME!!
The Turbo is fantastic and if you're looking at it like a collector, just start buying 'em up, cause you're not likely to play 'em anyway. *Shelf Warrior*? But, most of us here are gamers, and you pretty much cannot go wrong with any of the cheapie games that cost a nickel a dozen.
Start out with a few games that should cost you under a $10 spot like-
Legendary Axe, Dungeon Explorer, Sonic Spike (If you want multiplayer), Blazing Lazers, JJ & JEFF, and/or Final Lap Twin
and you'll be hooked like us!