I'm tearing apart an old bike I found and I want to build it up as a single-speed. This is the first time I've ever tried it and its more for the learning experience then it is to have an awesome bike at the end (I have an awesome bike already).

So, the wheels on this bike are shot and I need new ones, I don't want to attempt to build my own (not yet anyways). So where do I find a rear wheel with a single speed hub? And how can you judge the quality of a wheel?