One of these days I'll be getting some "zelda clone" that someone mentioned here (just search for it).
Plus, you can choose any of the indie games that I put in my sig. Awesome, cheap games. --- Worthy Indie: Magicians & Looters -Breath Of Death -Cuthulu Saves The World -EvilQuest -Trino -Shoot 1UP -Your Doodles Are Bugged -Vintage Hero
For XBLIG: All of the radiangames entries are surprisingly good. Trino is more expensive than other indies, but good if you don't mind that. One Finger Death Punch is simply amazing. Doesn't sound like much, but it's gaming brilliance, and really well done on a lot of levels.
For XBLA: Blade Kitten is a really good platformer for $5 (though you need to turn the voices all the way down unless you like everyone sounding like idiots). Try out Swarm and Adventures of Shuggy, too. Both (Nin2-Jump, also) are cute and cheap for what you get.
Watch for sales, too. $5-$7 is a pretty common XBLA price point for sales.