I recently bought several lenses for my GF1 off of eBay. All of them are Minolta lenses, either MD, MC or Celtic. The shot below was taken with one that I paid $20 for. The Minolta 50mm MD Rokkor-X f/1.4
I went to the mall today to try to find something to shoot because it was just too cold and windy outside. I came across a gentleman from Paraguay sitting in a chair with a music stand, a few CDs and business cards. Here's the shot of his hands while playing the harp.
Not bad for $20.