They were the first of the Beretta 300 series and have some parts interchangeability with the 301,302 and 303, most notably the barrels. They are a well made shotgun, I've had a 301 and now have used a 303 for more than 2 decades with no problems. Since the a300 came withfixed chokes it is less desirable than an multi choke model . Assuming excellent condition it would value less than $350.