No mail order, but I bought a bunch of broken amps from a guy a couple months ago. One item was a Randall stereo power amp that was described as "one channel not working". I didn't really look at it when doing the pickup, but when I finally got around to checking it out I found that the channel wasn't working because someone had completely removed the PCB for that side with all the bias and driver transistors on it. Presumably they took it out to fix it, but never got around to it and just put the cover back on and used it as a very heavy mono amp. I can't be too upset since I was basically considering that amp as a freebie anyway, but there were several other odd things about that deal as well.