The seller is responsible to work with you period. Do not let him off the hook.
Never, never, never, ship a heavy and expensive amp with UPS or Fedex. Always go to a trucking company like Pilot Freight and arrange for dock to dock delivery. You drop it off at the dock and the buyer picks it up at the dock. Your amp will be shrink wrapped to a pallet all by itself and it will stay on that pallet until the buyer picks it up. I do it all the time. It is the only way to ship a heavy and expensive piece of gear. UPS and Fedex will break it. It will get abused. It will get dropped, turned every which way from Adam, and dropped again.
They are not set up to handle heavy and fragile gear folks. I had too many broken amps show up to ever use them again on heavy gear.
Never, never, never, ship a heavy and expensive amp with UPS or Fedex. Always go to a trucking company like Pilot Freight and arrange for dock to dock delivery. You drop it off at the dock and the buyer picks it up at the dock. Your amp will be shrink wrapped to a pallet all by itself and it will stay on that pallet until the buyer picks it up. I do it all the time. It is the only way to ship a heavy and expensive piece of gear. UPS and Fedex will break it. It will get abused. It will get dropped, turned every which way from Adam, and dropped again.
They are not set up to handle heavy and fragile gear folks. I had too many broken amps show up to ever use them again on heavy gear.