if I bought a Colt SAA, I would put it in the box in a Safe deposit box and let it rise in value
Not me, I would shoot the out of it! I didn't live in the time period when they were THE handgun, and to me using one as a working gun would be the draw to having one. So I'd probably want to take it deer hunting...
Reason I can't afford one is that people have been sticking them in safes for years now. What the heck I may just splurge and scratch up another fine collectable!
I'll tell you a little tale about what guns are really worth... My dad died 3 years ago kind of unexpectedly, and the only provision in his will was that his guns went to me. Everything else to Mom, my sister and me. So I inherited around 45 guns in addition to what I already had. My dad was sort of a Colt loving guy - although he didn't have a SAA (how I wish...) because they were so expensive. He did lust after them though... His favorite colt was the Woodsman, because he grew up shooting one. So I have several pretty nice Woodsmans. I also inherited a Colt Python from him that he bought when I was in my early teens (about 30 years ago) and it was never fired, and still had the box & papers, etc.. He didn't really buy it as an investment, but just never got around to taking it out to shoot.
Now the difference between those is, I sold the Python and bought two other guns with what I got for it. My dad would have approved, since I sold it for well over twice what he paid for it. On the other hand, I will NEVER sell any of my Woodsmans, and I take one or two out to the range and shoot them every time I go. Every time I pull the trigger on a Woodsman, I think of my Dad. It wasn't the same with the Python, because, while it was an extremely sweet gun, it wasn't HIS in the same way, and since my dad raised me, I think like him in lots of matters and so I didn't feel that it was worth $500 to shoot it once.
So if I ever find a fair deal on a Colt SAA that is not being sold as an investment, I'll probably take it and buy a box of ammo the same day, and make it forever MINE!