Target.com has a couple CEs discounted a fair amount, haven't seen them posted here
Gears 3 Epic for 60
http://www.target.com/p/gears-of-war-3-epic-edition-xbox-360/-/A-13566218#prodSlot=medium_1_1
Gears 3 Limited for 40...
Was looking at Darkstar One, figured I'd pick it up then saw this:
http://store.steampowered.com/sub/2327/
Dunno how good Patrician 3 and Great Art Race are, but all 3 for 3.39 seems more than reasonable.
50 achievs 1000gs, I'll leave this deal up since D2D will only be for today and some people just have leftover MS Points to pick this up with.
http://www.xbox360achievements.org/forum/showthread.php?t=308267
Is where I got the achievement answer.