Since I seem to be buying and selling amps fairly regularly, at least compared to most others, I thought I'd start a thread about our experiences buying and selling used equipment, specifically amplifiers for me. Used stuff is always a tricky business due to the fact that they get more delicate as they get older, dubious owner history, and the possibility of huge repair costs at any moment with no warranty. However, they payoff's can be big and even though I've been burned a few times, I'd say it's been worth it.\n\nI've been through a few amps Outlaw, Rotel, Crown, Cinepro, Verastarr, Threshold, AB International, Adcom, Crest, Peavey, Perreaux and a couple others that I can't remember plus multiples from some of those brands in different model and channel flavors. All in all, I think I've run through 20+ different amplifiers from 2-7 channels over the last decade. I've had them break, short, parts fall of and cause arcs, caps fail, and protection circuits fail to protect, just to name a few incidences. Hindsight has been an unforgiving mistress, but I've also ended up with some real gems. I could buy new, pay quadruple or more, and call it done for the next (hopefully) 10-20 years, but that just doesn't appeal to me. Sure there are some components in my system that I want to set and forget, but speakers and amps seem to be my failing where I love searching for a great deal for the latter and I can't stop building for the former.\n\nMost recently, the Verastarr 6.4SE I bought maybe a year ago started making a horrible buzzing noise. I shot Bob from AB amps an e-mail asking him what he thought (since he built and\/or designed it) and he thinks the main storage caps are starting to go. It'll be a pricey repair, especially shipping to CA, but it should provide many years to come after he fixes and benches it. Cost of the amp plus repairs still brings me to about 1\/3 the cost of a brand new version of this same amplifier so I still count it as a big win.\n\nI would say my biggest win is still a Threshold S\/300e in near mint condition.\n\nAnybody else?