Rare Holy Grail tone machine Gibson RVT stereo Amp

A very cool amplifier, Reading online, I found that this is considered one of the top five amplifiers of all time for tone conscious recording studios. Looks to be all original other than maybe a few capacitors and it has a three prong power cord . Looking for a fair cash offer ( if you don’t know look online for a general value reference before you start shooting low balls offers ) Might consider trade for the right VOS style, Gibson SG Or possibly other Guitars but only US stuff Thanks