Yeah I looked around gun broker and some other sites, and see the wide variation in pricing there as well, which is why I was hoping for someone that knew what they were looking at to take a peek. the different markings on the firearm will indicate the grade and other things to look for. I can't pick up what those marking are from a gunbroker posting, although I am starting to track down some info on some of the collector forums as to what the marking indicate (Grade, Gauge, Choke size, Barrel material, etc).
Thanks for the suggestion, that is the method I'm using, in conjunction with the blue book, for most of the other pieces I'm determining values for.
"Arms discourage and keep the invader and plunderer in awe, and preserve order in the world as well as property. . . Horrid mischief would ensue were the law-abiding deprived of the use of them."
- Thomas Paine