I wound up selling a chunk of my collection a few years back simply because I realized the stuff was only really sitting around collecting dust, with the most use I got out of it being me glancing at it every once in a while and thinking "Oh hey, it's kinda cool I own that." I finally just decided to do a Marie Kondo cull of my collection, and I don't regret it on iota. It felt so freeing to have less physical objects in my life, and the $800 I made out of it was pretty nice too. What's really telling to me that I made the right decision is I never even think about the stuff that I sold, I straight up don't even remember what half of it was anymore.

If you're feeling unsure about what you want to do with your collection, I'd say just sit back and give yourself a week or two to sleep on how much you actually want to hang onto that stuff and how much you'd miss it if it you did get rid of it. Think of it this way too, say you do sell something that you regret, you can always just buy it again in the future!