Steam Store alternatives??

I can link you one place where i bought saints row for 16 euro (steam price 50 euro), but not sure the site rules let you link other sites.

Try the stores listed on http://www.steamgamesales.com/

I doubt you'll find dedicated stores other than Steam that just sells Steam keys. You're going to have to do your own research and see if the games featured at sites like GMG, Amazon, Gamersgate, or Impulse can be redeemed on Steam.

be careful with get games go. The keys they seel you might not be activated and they won't tell if if they are bad.

Here is a list of authorised Steam key resellers:

GreenManGaming
GamersGate
Impulse
Direct2Drive
GetGamesGo
Amazon US

Make sure the game you want is Steam redeemable before buying it though.