Steam Tradeable Games:
Deponia ($5)

Gamersgate Giftable Games:
Company of Heroes Gold + Company of Heroes: Tales of Valor x1 copy left ($2)
Prince of Persia: The Forgotten Sands ($2.50)

Steam Keys:
Borderlands 2 Season Pass x1 copy left ($12.50)
The Elder Scrolls IV: Oblivion GOTY Edition x1 copy left ($4)
Alan Wake's American Nightmare x1 copy left ($3)

I prefer paypal.