I perfectly know I can do better. It's a case of having old Oracle Delphi V and period matching player on display for occasional spin so audio concern is a secondary issue in this case. The seller is basing his estimate on Bluebook value and there are no sales of such unit in recent years posted online to form opinion of what the unit is really worth. I do not wish to offend him in any way since he is a nice guy but I'm not willing to spend more than close to real value since its a frivolous expense in bad time if it comes to my personal finances. I only consider it because it's local and something I was thinking of doing for many years (and never could justify the cost) . A karma sort of thing :)
Thanks for all replies!