Good non-bundled games under $5?

amput-tea, plants vs. zombies, binding of issac and dead pixels. (i looked in steams under $5 and when from page 1-9) these games are good and i also played them before

If I were you,I would wait until Summer Sale and get a game thats usually around $15-20.

Praetorians 4.99 last time i checked

Skyrim, when on sale $4.99

Sleeping Dogs, Deux Ex when on sale

Will your friend be using Steam Wallet? Or does he have PayPal or something as well? Because Steam Wallet alone is pretty limited, and Skyrim and Dishonored (which is a game I absolutely love and would highly recommend) are currently about $4 each on GameFly UK in case you're interested. I can offer to help your friend out in getting whatever game you want for $5 as I'm able to get games from pretty much anywhere due to my, eheh, connections. But yeah, I'm offering my services to get you the game you want for as cheap as possible, I'm not looking to profit or anything here, I just want to use my skills to help people out. As long as you get what you want and I don't make a loss, I'm glad to help. :)

Bad Rats: GOTY

EDIT: non bundled. cant help

You may want to have a look at this. If you follow bundles you can sort out some games easily, for the rest you can use Enhanced Steam to display if they were in a bundle.

Not sure if you hate Origin but they are having a nice sale right now...

A.I.M., A.I.M. 2 Clan Wars, A.I.M. Racing (The best of the three is A.I.M. 2 Clan Wars so probably its better to star with it).

http://store.steampowered.com/app/40930/

The Misadventures of P.B. Winterbottom for 4 euros.
Fantastic puzzle platformer which almost noone know. ;-)

http://digital.gamefly.co.uk/#!/download-dishonored/5004505

http://digital.gamefly.co.uk/#!/download-the-elder-scrolls-v-skyrim/5002231

Wait for a sale on some of these big budget games (max low price is usually $5 after a while)