I've never trusted buying off of them cause I don't want my bank info stolen but I've recently realised I can just pay with paypal lol. Can anyone recommend which of those sites that sell keys for steam games are legit? I just need 3 copies of l4d2 to game with my friends.
Best case scenario you are buying a key that someone bought in a cheaper region and is selling it in a more expensive region.
Worst case, your financial details or login are stolen.
Most likely case, you're buying a key that was either bought with stolen cards or a key that was directly stolen.
In any case the developer of the game can revoke a key for being obtained fraudulently, and since any keys bought with stolen funds are susceptible to a charge back fee and thus cost them money many would just prefer you pirate (since that costs them nothing).