I’m not a kit collector, nor do I have a large stash, maybe 24 kits all needing to see the bench before my time comes. Kits need to be built, as that’s what they were designed for. Many years ago when I was a member of my local IPMS chapter, we had a kit collector who bought up everything he could for years. Well, when his time eventually came, his massive collection was put up for sale and the better kits eventually made it to a few IPMS contests. Unfortunately, none sold for much, some eventually were given away or donated, but the rest went to the recycling center.
IMHO, plastics kits as I said were designed to be built, die cast cars were from the start slated to be collectables. Those plastic kits that have grown in value are few and far between. Most because their molds have long been remelted so they can’t be re-issued. And then their’s the old kits with existing molds that aren’t re-issued as the Corp bean counters just don’t feel that they will turn a profit worth the expense and time taken from molding a better kit. It’s just that simple.