I have a great deal pending on a solid model 120, but while test firing it the trigger stopped resetting. Now I'm not sure if the great deal would still be a great deal if I end up having to replace the trigger assy or even just having a good gunsmith work on it. I read that it may be the reset spring, pin, or just gummed up. Either way, does anyone out there have any advice for me. I'm paying $100 for a now non-functioning shotgun. Is it worth it?