Have: Company of Heroes, Alien Breed 2, and Broken Sword: Director's Cut
Want: Paypal & Amazon: $1 for the indie titles, 3.50 for CoH.
I'd give all 3 for (and maybe a bit of paypal extra for a few of the more expensive titles): FTL, Tower Wars, Resident Evil 5, Orcs Must Die 2, Torchlight II, Cladun X2, Penny Arcade 3, or Iron Brigade