I picked this one up today. PSB 100C for $75. Listened to it for about 15 minutes by itself with no other speakers playing and it does a very decent job, more than enough performance for a secondary system.
http://i.ebayimg.com/00/s/NTY5WDEwMj...Tt5Ky/$_20.JPG
http://i.ebayimg.com/00/s/NzkwWDEwMj...Tt5K1/$_20.JPG
http://i.ebayimg.com/00/s/NjA1WDEwMj...Tt5LB/$_20.JPG