Sorry I came to this so late. If possible, can you have a gunsmith check it out for any work done on the choke and/or chamber. A lot of trapshooters make all sorts of alterations to the bbl's interior which in most cases will devalue the gun. It should measure up to original specs. If not, you could try it out and if you like it make sure you get it at a very large discount. In any event you would be wise to have any used gun of that quality checked for safety before you buy. In contrast an 870 or 1100 is not as risky to buy used since you can replace the bbl with a new one for very little money.