Since I recently sold two Colt Pythons that were new, in the box with paperwork and the plastic locks still on the triggers- at the Louisville gun show, yes, they went for quite a bit more than the ones that were fired. Taking a nice Model 12 and putting screw in chokes? Don't be surprised if you don't get more than a few hundred dollars for it someday- if people even look at it at all. If you are going to use a Model 12 for skeet, it doesn't sound like you are going to try to be really competitive and will be shooting more for the fun of it. So keeping the Model 12 original and trying something else would be my choice. Original Model 12s are getting harder to find and taking a nice one and opening up the chokes? Have you given any thought to putting a thumb hole through the stock and maybe some camouflage tape on it? That would be cool. To each his own.
