I have a Benelli M3 that I do not use and I am looking to sell. It has the 18.5" barrell, ghost ring sights, factory pistol grip stock along with mag extension. Someone has also added a receiver saddle holster that holds 5 or 6 shells. They also added a single sling point between the stock and the receiver. Anyone have a good idea of what I should be asking for the gun? It is in good shape. I am not trying to get premium money but would like a fair price. Thanks