Marshall JCM 2000 DSL 50 - $750
Excellent shape. Looks and sounds great. Just check the HC reviews and do a search about how everyone feels about this amp. I just picked up a Boogie so I don't really need this amp anymore.
If you're interested, I also have a pair of JJ KT77's that I had bought to put in this but I never got around to installing them. Will include those for $50.
http://images102.fotki.com/v400/phot.../dsl50a-vi.jpg
http://images22.fotki.com/v835/photo.../dsl50b-vi.jpg