I've slowed down on my collection but what I have is because it's something I've wanted, not bought because it's collectable. There is some stuff I have that I bought because it was on clearance at clearance prices, e.g. Rogue One, 8" figures, for about $6 each which I think are really worthless nowadays and are sitting in a tub, but who'd want them?
I'm fortunate that my daughter loves my collection and would happily take them when the time comes. I'd been buying models kits during my working life, not building many, collecting to build when I retired. I have just over 100, if I build 1 kit a month I have enough to keep me going for 10 years, crazy!
I've got rid of some kits that really didn't appeal to me after I'd bought them, the ones I have left I do want and some are now quite rare and collectable, but I bought them to build but should I keep them off the build list so if i needed the $ I can sell. ) Dropship, Sulaco, Starfighter etc)
I've now been forced into early retirement, my company made me redundant and I'm at the age now I don't think I can find work even if I wanted to. I've been off for 5 months now, and have had many things to do about the house - all those projects waiting for the right time. They're nearly all done, so I'll have the time to build some kits. But once they're built then what? More clutter?
I also have a small collection of 1:18 scale war-bird planes, Zero, Corsair, Spitfire etc as well as a 1:18 SCALE F/A - F18 C HORNET but neither my son or daughter want them so am I better off selling to someone who wants them? I do enjoy having them though I guess that matters.
I'm currently dealing with my elderly parents, dads in aged care with dementia and mum's at home, and she's working through getting rid of her stuff as well as my dads 60 years worth of tools etc in the shed, it makes you think about what you have and what you're leaving your kids to deal with.