Welcome, @oldair1968. Per recently sold listings , it would seem that P-36s have been going for between $450-$1,000 USD, depending on condition. You can reference this in negotiating what you feel is the fairest price with the seller. You seem to already know about the following; so this is moreso ...

Hi everyone, First time posting here - please take it easy on me. I am thinking of pulling the trigger on a mint Parker P-36, the gentleman has lowered the the price to $675. I checked on Reverb and only see one for sale there and it is the same color/model that I may be buying: https://reverb.com/i...