Ha!
I know that shop! [PM sent to OP to confirm]
Walked in there three years ago this month and was blown away at that gentleman's collection. Most everything was well above my knowledge level. P08 Lugers, dozens of Nazi Ehrenwaffe PPK's, and a Colt 1878 SxS tucked back in the corner, amongst all the crazy pieces of history he had.
There's another LGS, other end of town from this one where the owner has the best collection of very old and rare lever rifles that I've ever seen, hung way up high on a main wall. Those guns are also beyond me, but it's worth it to ask him to tell you about them.