All guns may have two values - One, its value to a shooter/user, and two, its value as a collectable. Some guns have both, and one or the other may be substantially more then the other, or potentially so in the short or long run.
Let me give you an example. One day at an auction I was the only bidder on a Colt .38 Police Positive. There were plenty of "shooters" around, but they played it scant notice. After all, these days who would want an old revolver chambered to use the useless .38 S&W cartridge? Why in a revolver with a 4" barrel it only would push a 146 grain, round nose lead bullet at a bit over 700 FPS. Neither hollow-points or Plus-P ammunition was available. And to make matters worse, it wasn't heavy enough to make a good boat anchor. I'm sure most if not all of the shooters posting on this thread would deem it to be totally worthless.
And I am so glad they feel that way...
This little Police Positive was in like-new condition, and probably unfired (such a shame)
. It was made during World War Two out of previously manufactured parts when there was a desperate need for anything that would shoot. Production was limited to the available parts on hand, and most were sent overseas to allies who could better use them.
Now while all the "I only buy what I can shoot, and shoot everything I buy," guys were turning up their collective noses, I got it for a song - knowing I could sell it several times over what I paid to a collector, and turn the profit toward any other gun I wanted.
Most of the time the firearms that are popular with shooters have limited collector appeal, and the more popular collectables are priced beyond the shooter's means - but there are exceptions, and I often make some money on those exceptions. Shooters on the other hand tend to make the local gunshop owners rich.
Also nowhere is it writen that collectable guns can't be shot, unless they are too old, in poor condition, correct black powder ammunition isn't available, or they are mint/like new and unfired.
So to those who absolutely must shoot everything they lay their hands on I say... "Keep shooting boys! Keep shooting. I havent made enough $$$$ yet.