Man that is a tough call. You did expect to get the amp in working condition and it sounds like you didn't, but at the same time you did buy a used amp with no guarantees or warranty. I guess going USPS the package wasn't insured, right? First reaction would be to see what, if anything, the USPS can do for you. If that fails I would try to go 1/2's with the seller on the amp price and shipping. It would be nice if we held each other to higher standards than strangers when dealing with things of this nature on this forum. Most people here seem to be good natured and I know it would be asking alot, but we should really look out for each other if possible. If not, we really need to be sure that every transaction on this website is "buyer beware". Unfortunate situation all around though. I'm sure the seller doesn't feel great about this.

Great piture of the chicken btw. Made me laugh.

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Profeshenal spellar