Not a lot of info regarding condition of the shotguns. I do know the AH Fox sterlingworth is worth $1,000.00 + in just about any condition, as I own one and keep an eye on the market. The new in the box Mossberg/Maverick 88 I'll agree with woodmaster81 on that as well. $120-$150.00. I actually saw a new in the box 88 listed recently for $150.00. Back when they first came out, my buddy bought one for $85.00 brand new. Somewhere around 1988. The first version of the 88 had 1 slide rail, later (around 1990) they decided to put a slide rail on each side to help with loading and ejecting. Do you know if yours is the early or later design? If it were me, I'd ask a little more money for the later dual slide rail design, as they worked better and were just a little stronger.