I had a bit of money on Amazon and had no idea what to spend it on, so i just bought the bioshock 1,2, and infinite bundle they had at the time. The computer im on right now a piece of shit and I didn't know whether or not the game would run well enough, so i just let the game keys sit in the amazon account since March.
I have the 15-number/letter keys for all three games, unused. All you would have to do is activate them on steam.
I've been told that the same bundle went on sale on steam sometime recently, but just offer if you're interested -----> looking for paypal
PM me