Tony's is located in Dafter, north of Paradise in the far eastern UP. I don't get there often because it's a full day's trip there and back. Lots of used guns there, takes a couple hours looking to even scratch the surface.
The one I go to most often is J's in Powers. It's close by, friendly, fair prices, but a relatively small stock on hand.
When I pass thru Ishpeming I always make it a point to stop in at Wilderness Sports. Reminds me of the "old time" gun shops - squeaky floors, crowded with merchandise, used guns out on racks where you can handle them. Decent selection of new longguns, pretty good stock of handguns.
Been to the Gun Barn in Iron River. Lots of guns, but after looking at the prices I didn't feel inclined to buy anything!
Hope a few others chime in here with some new locations to explore!