I've known guys with guns they didn't shoot, some of them made sense, some made me scratch my head. The commemorative theme guns used to be a really big deal, so people would buy them box them, and wait for the price to go up. The thing is, like anything else that is collectible, it's hard to make something with the INTENT for it to become more valuable over time. Things usually become collectible because of something that happened LATER.
Collecting them to invest makes sense, but you would have to know what you are doing a lot better than I do. when I was a kid, I had a guy show me a pretty engraved Remington autoloader he bought because he wanted a pretty gun he wanted to take out and shoot. But, as time went on, he just couldn't bring himself to shoot it. Like the scene in "Dirty Rotten Scoundrels" where Michael Caine is walking Steve Martin through the wine cellar, showing off his wines that are fantastic.
"Great, let's drink some!"
"I can't drink them, they're far too valuable."
"So, sell them."
"I can't sell them, they mean far too much to me."
I don't get it either. I just ordered a commemorative Para for my unit's deployment, and I'm going to make it my main competition gun. I'll stop shooting it. When it's completely worn out.