RE: Mossberg 695 bolt action slug gun
A 695 should fetch somewhere between $200.00 - $300.00 bare gun depending on condition. I have one and they are great accurate slug guns. Be advised however that there was a recall on them from serial number M000101 to M015304. The slug guns in this range may discharge when closing the bolt during the loading of a live shell into the chamber.
You can send it in to Mossberg however for free to have it repaired.