I have a set of Logitech Z-560s that are just what you are looking for. Excellent quality as you will find by reading some of the reviews. They are in extremely good condition. They are 4.1, but make an extremey nice 2.1 setup. (I personally use them as a 2.1 setup). All the goodies; manual, retail box, etc. I'll even throw in some upgraded speaker wire.
I'm looking for around $150 with shipping, somewhat negotiable.