The market price model I use is as follows. Purdey is Brand Value level one (BV1). The Purdey built Beesley designed self-opening SLE is of Original Quality grade one (OQ1). The question, then, becomes the level of Current Condition (CC?). The description sounds much like CC4 - "heavy use, but no abuse." BV1-OQ1-CC4 = $16,000.

This sounds like a very straight up deal. You have a very good man on the check-out.