Have 3.51 euro, what do you recommend ?

Save it for later and add to it over time, unless you live in Russia in which case you could afford pretty cool titles with that money.

One Way Heroics

http://store.steampowered.com/search/?filter=ut2 :D

what type of games do you enjoy?

Flatout 1,04€
Urban Chaos 1,49€
Marlow Briggs 99 cents

Sell a card for 1 cent and you can get it :D

Or buy Deus Ex GOTY for 3,49€ _

I bought yesterday Witcher for 1,19€ (Part 2 for 2,99) and Hotline Miami for 1,12€? :)

or sort the games by price. :)
Or take a look at your wishlist.

Euro Truck Simulator 2

At least that's what i'm gonna buy in the tomorrow.