Any cheap good-looking steam profile background?

There are tons of great backgrounds, by my personal favorite are Trine 2 ones.

I can give you my spy background for free, if you want, depending on if I still have, which I think I should.
Tried selling it for months, but nothing, so I took it off the market.

PC - Game Dev Tycoon might appeal to you. Fitting if one is of the 'PC Master Race' crowd (I detest them myself :P).
My own personal favourites for now are Strike Suit - Strike Suit Zero and Mista and Gudrida - King's Bounty: Warriors of the North but I doubt either are very cheap.

The Mayor, Pipe Down, City Limits... Perhaps something like that?

mine ;D

Payday 2.

Koi from Shogun 2? Sengoku?

Look at mine
This is sexy profile background :-)

I like Markov Geist.

this

I like the one i'm using. It's a common background so I think it's fairly cheap. Is from Telltale's TWD.