I don't know what a "steam key site" is (sounds kinda sketchy) but I'd just keep an eye on Humble Bundle? They deal primarily in steam keys but sometimes get different sales than Steam does.
It's hard being the voice of reason when you're surrounded by unreasonable people.
@bigmike20vt - Yes, I picked Doom VFR from there for £9.99, it's a bargain atm. Has mixed reviews though, so I'll have to get to look at it some time. I really need to start playing these games instead of collecting them.
@RedRizla - I bought Doom VFR (Humble Bundle) last week, it doesn't like Steam VR beta either. That and I'm having big issues with Touch controllers - but that may be just me doing something silly as others have posted that they have no problems using Touch. Not got past the 'training' part to comment on the game proper.