I have a strong preference for wool socks rather than cotton. The least expensive widely-available option is Windsor Wool socks by Gold Toe; they go on sale with some frequency at better department stores, and also the Gold Toe outlets and web site -- around $6 per pair for over the calf. I think Nordstrom has some private label wool socks that are a bit more; also, keep your eyes on Sierra Trading Post, which sells Falke, Pantherella, and various other makes at times. However, these will not be as inexpensive as the Gold Toes, though they will typically be finer wool and a more elegant weave, but also less durable. I machine wash and dry my Windsor Wool socks but line dry my nicer makes, which difference can also make the Windsor Wool socks more appealing. (Oops, didn't notice your location....)