Some of these kind of overlap....
military style: I want a Napolean... Just to see the smoke.
old fashion: I want a real punt gun... boat... sink box and all. Or a 1 of 1000 Win '73.... just so I can be like James Stewart in the movie of the same name... the best low budget western ever made.
pistol: I'd like to have a genuine LeMotts. 41x16ga. I bet BigJ has one... and yes when you read this thats a request if you really do have one... you should charge admission.
muzzleloader: I'd like a real, genuine blue ridge squirrel rifle.... or an 8 bore fowling piece like some of those limeys use to shoot down UFOs with.
But really though, if I could have anything... history and riches aside... I'd like to have a matched pair of Purdeys in 16 and 28ga... and the stones to acctually hunt with them.