It's worth however much it gets bid up to on the bay. Tell him I'll give him $450 for it since I will never pay out more than that for a 40 year old "Core Amp" which I'd WOPL. Especially an amp with a beat up face plate we will never be able to replace. I've wanted one for a long time but the condition of them when they do "Pop"up, is not good. The Pro amps don't usually get treated very well. IMHO......