For sale is a Sony X-Plod stereo.
It was removed from my Honda Civic a couple years ago, and is about 10
years old. It always worked well. It's quite versatile with an aux input, as well as
USB, AM/FM and CD. It has outputs in back in case you want to use an additional
amplifier, but it was fine for me when I was commuting. It originally cost about $100.