A number of years ago, I wanted a new video card for my computer but didn't have the cash. I looked through my safe and decided to sell a Springfield 1911 I got for a song since I had a couple other .45's.
Now when I'm out browsing Gunbroker, what do I find myself looking at? Springfield 1911's of course.
The lesson I learned is once you have a gun, never sell, trade or even think about reducing your collection. You'll regret it, especially if it was a good shooter!