Bought CSS+Gmod bundle but I already have gmod and steam won't give me the extra copy so I figured instead of wasting it I would just trade for CSS. Exchange will be done over steam.

Offers must be for steam games/codes, exceptions for BF4 and Titanfall (codes only no accts)

Contact infos: steam penguin fan93 || skype ilovehorsezz

Proof I have the bundle