I'm looking for a copy of Left 4 Dead 2. My girlfriend owns the game; before we started dating, a kid we both knew from college bought her a bunch of Steam games when they launched, and Left 4 Dead 2 was included (I think Borderlands was one, as well). I've been using my girlfriend's Steam account to play the game, but I bought her some games during this past sale and she has been using her own account a lot. Furthermore, she's just starting to get into the game herself. I enjoy the game and would like to be able to play it on my account with my girlfriend, or while my girlfriend plays Plants vs. Zombies. But seeing as I'm only interested in owning a copy for that reason and otherwise have access to the game through her account, I'd probably only pay $5 for it, or trade my extra copies of Osmos and Freedom Force for it.
Thanks!