>>53636384I sold my PSA 10 Karen's Umbreon (for not really a profit once you add up fees) after owning it for a while. Needed some money for a different investment, so liquidated it and now it sucks because I have to pay double if I want it back from the Chinese guy I sold it to. But, I had money cleared in a couple of days and it really did allow me to make an otherwise difficult purchase.
If I don't have to, I won't sell any of my cards unless I have multiples. I have them for art value and also as a store of monetary value to some effect. Market may go up or down, but at the very least I can still have them as a bit of a stash along with the other collections and small amount of silver I have.
It's not as much of an investment as it is a "I get to enjoy my toys and if I ever need money I can sell them" situation.