dh-220 that appears to be factory built. all parts are original (it should probably have its caps upgraded, at least in the PSU). case is fairly clean, 8/10. $200 with local bay area pickup. if shipping needed, buyer pays actual cost.
dh-500 that I bought used about 10 years ago from a local guy. I used it for 2 or 3 years and after a move, it never got used again. been in storage for at least 8 years, now. olive green (standard) color. has rack handles. case is also about 8/10 in condition. I have not upgraded anything on it and it would probably benefit from the usual upgrades. $400 with local pickup.
both amps work and sound quiet. the dh220 has some trafo hum if you are about 1 foot from the amp. if you are seated, its inaudible. the dh500 has a single fan and its the original factory fan. I don't like fans at all and that was one reason I didn't prefer to use this amp. its not loud but it is a fan.
pics can be provided to serious inquiries.