I don't collect for money at all, actually, Vintage Computing was about the exact opposite for me. I did not get into it as a hobby, but rather - I was 18, could not find a job, wanted internet, a 486 can get on the internet, and 486's are $10 a pair at Salvation Army (circa 2001), so buy 2, take the best bits from both, build one good fast one, put the most modern Windows on it possible, and run it into the ground. That's where it all started for me....that and because for about 12 years, I vowed I would get a bigger, better, faster 486 than my sister's 386 that caused so much family drama with repairs (that I was always the scapegoat for). I'd say I conqered both goals.
Now I just use them for retro-gaming, and I"ve rather well stopped collecting and just have 4 old machines I'm a caretaker and upgrader of - a Tandy 1000, a 286, a 486, and a Mac SE FDHD, all but the Mac are souped up about as far as their little 60-200 watt power supplies can handle. I got out of the game as soon as I started seeing such boxes on fleabay for $150.00 a pop. It just defeated the purpose to me....from being a almost "Free" hobby to costing me large sums to get some obscure hard-to-find piece of hardware to make a 15+ year old PC work the way I want it to.
My woman gave me a Man Cave for all my stuff, I feel lucky. About the only thing I get any grief for is the time it takes to fix/tweak something so we can do something with said hardware. Thankfully a few hours last night with her sleeping gave me the time to get everything fixed better than ever. Hopefully some Turkey Day gaming is in order once I get everything on the Tandy.