Adidas makes several decent models that I like. My local Costco carries one of the versions (note, they have a running sock, and a footie/"no show" athletic sock with the same/similar color scheme, so make sure you get the running sock). The other adidas sock I like, I just picked up at a Fred Meyer (similar to Walmart if you don't have them where you live). As the previous mentioned sock, I don't know the exact name, I think it's something to do with heat control (coolmax etc).  These all sell for $12 or less for a pkg of 2-3 pair.

In both cases they are fairly cheap yet durable.

my personal favorite socks are the baluga socks. They are by far the most comfortable (and cushioned) socks that I have tried.

I found them at Fleet Feet.

I second the Balega Socks suggestion.  This brand offers a couple of different lengths, and choice of thin, medium, thick.  They are so comfortable; they keep their form, and they stay in place.  I don't run in any other brand of socks.  They generally cost between $7 or $8 but they are very durable; I only wear them to run and they've lasted at least three years.  I have tried Injinji's in the past, and I like them, but not as much as Balega.  I still use the Bodyglide or petroleum jelly on my feet during long runs; don't know if I need to, but better safe than sorry.

Smartwool.  I love them.  They're not cheap, but they are fantastic.

I love the Smartwool phd light weight running socks.  They wick, and comfortable and last a very long time.  I love them!  I have recently started trying Wright Socks. They are also veyr nice.  They do not seem to wick as well as Smartwool, but they have a double layer of fabric on the toes which seems to be helping with blisters that I repeatedly get on the tips of my toes. 

Every time I head to a running store, there seems to be a new brand out there. But I have found that the extra money is usually worth it.

Good luck!

I run in Thorlos in warm weather and Smart Wool Adrenaline Light Mini Crews in the winter.  I use Body Glide on my feet to prevent blisters on long runs.