Hi and welcome to our Forum. Most questions we an answer or at least answer from what we personally have had experience with. But coming up with a Fair Market price for a pistol is a guessing game and not a good one. I would say look over GunBroker.com, AuctionArms.com, GunsAmerica.com and do an in general web search using CZ 52 and then another using 7.62 x 25 ammunition prices and then work out an average. I have seen CZ 52 that were/are virtually new in Box go for less than $500.00. and as I mentioned it was brand spanking new for a 50 year old pistol. Even the tether and the cleaning brush were still in sealed bags. So a used one could most likely go for anything. I have seen all kinds of prices for them. Best wishes for a speedy sale, and once again Welcome to the Forum