What is the value of a smith and Wesson 9mm model 6906 with serial number VBF3151?

value has everything to do with condition of the firearm. if it functions well, which i bet it does since the 6906 is awesome and will eat any ammo in the world, then it comes down to aesthetics. if there is a lot of holster wear and dings and scrapes and scratches etc, youll be lucky to get 200 bucks on a trade in (275 personal sale) if it is in 80-90% condition, you could get 250-275 on trade in (325 personal) and if it is 95-100% aka almost brand new youll get 300-325 trade in or (400+ personal sale). if it is brand new, never fired, you could ask 500 and not feel bad. you also want to figure in 10-20 bucks per extra magazine.