Absolutely! I have a very large collection of mostly high grade military firearms from around the world, have a Curio and Relics federal firearms license, sold firearms professionally, and prices keep going up and up. Condition means everything, and US weapons from WWII are extremely hot, as are German, Japanese, Fin... Import banned guns are very costly to buy now; My IMI Uzi and Galil are such examples that only keep going up, up, up. Even service rifles like my French MAS 49/56 that was dirt cheap a few years ago, has gone up tremendously... I love my example that is very clean in the original 7.5x54 cal, non refurbished... Same for my Russian SVT-40, Swede AG-42, Super rare FN-49 Argentine in 7.62x51... WWII semi auto handguns are very hot too, from all sides. Ever check the price of prime WWI/WWII 1911's or even 1917 revolvers, P-38's, Polish Radoms, wartime P35's, Type 14 Nambus?
I get to reload for them, shoot them, and enjoy their history, all the while their value continues to climb. Sure, they are not the easiest thing to own if you move a lot, but the old world quality they all exude will never be seen again. Even modern guns can skyrocket in value... I know for a fact I can sell any of my 70's vintage 870 shotguns for way more than I paid, same for my Rem 700 rifles, and really make a killing on my Pre lock, pre MIM S&W revolvers. Charles Daly/Miroku O/U shotguns appreciate, as do WW lever .22's, pre-64 model 70's, etc. Very good quality from the past means good prices/great appreciation now. Even good quality reloading gear keeps it's value and appreciates. I know for a fact I could get at least $100 over what I paid for my Dillon 550B press from 1995, and get more than I paid for my RCBS presses from the 70's. God I wish I had really stocked up on primers and shot to sell.
Good luck, and please PM me if you think I might help your situation