I love my GEC knives. Beautiful, well made, a joy to own. That being said, my main user knife out of the dozen or so I own is one I bought that was pre-owned, with a minor patina already on it (which I polished off). A #12 Powderhorn Jack.
Two reasons it is pretty much the only GEC I carry and use: #1, I just love the pattern. #2 - It was already used, so the "too pretty to use" issue was already taken care of by the previous owner.
It's really a moot point. I "need" about 3 or 4 pocket knives. I could get by with 2. I own about 150. So the fact that I only carry and use a subset of that is a testament to my over-consumption during a brief time in my life when I had what I thought was excess disposable income.
But honestly - if you have something that gives you joy in the owning and use of, don't worry about the resale value, or what it would take to replace it. Just use it, get that joy. It is very satisfying to own and use a quality tool, if you are knowledgeable enough about the tool in question to appreciate it.