That said, life has been pretty stressful the past couple of years for me so all the things I normally enjoy have lost their luster and I'm pretty apathetic to most things these days.
This would be an indication that you shouldn't make any drastic decisions right now. Sometimes you'll do things while in a funk, thinking they'll help you feel better. It might not have the effect you're hoping it will, and then some day when you're feeling back on your feet again, you'll start to wonder why you did some of those things, like sell a bunch of your collection.... and in today's market, it's not likely you're gonna get any of that back without spending way more. It's not that you'll need that stuff per say, but maybe you'll still wish you had it.
I've committed to the ambition of playing my stuff, and then as I experience more of it, I'll take a step back and determine if it's something I want to keep or not. I even have crazy notions of maybe starting a channel some day, just purely as motivation to play all my games, in the form of let's play style videos. It doesn't really matter to me if anyone watches, I just want to chronicle the playing of a lot of games that I've bought over the years. We'll see.