Buying anything that is vintage is a gamble. You have to do your homework by reading reading reading. It does't matter if you collect books, Hifi equipment or Cars. Wonder why no one collects TV's. I imagine there are a few, but nothing like the folks who collect Marantz and Mcintosh tube stuff. Its amazing to me with a little dickering you can buy a 275 VI new cheaper than you can a pristine 275 I. I bought my MC 207 new cheaper than used units today about 6 months after they were introduced.
Some GW managers have definitely been paying attention to Ebay prices:I bought several top line stereo receivers around 6-7 years ago and some of the current prices (ebay, where else) have significantly increased from what I paid. .....
I do see an occasional tv from the 1950s through 1960s eras......one set in a local GW had been stored in a wet area and the wood laminate case had been soaked and completely de-bonded-no tubes in the unit, either. Just the CRT.I have a few TV's, by a few, I mean nearly a dozen. If you a TV collector, you pretty much have to be a tech to keep them going, as old TV's, even when nearly new, required regular service. Expensive to restore, compared to radios or even stereos, and CRT's and CRT rebuilding is NLA, although the Early Television Foundation is working a getting a rebuild system back up and operating, since the last CRT rebuilder, in the world, closed down a few years ago. Although the TV group is a tight bunch and nearly all of them hang out at Videokarma, a few on ARF, and some on both.
Reliability must have depended on model.Some can be surprisingly reliable but still they need attention. Mid 50's to 60's RCA and Zenith are best. Black and white of course. Color a whole different story.
Demand for land is always there, and land doesn't wear out, or become replaced by something better than land. Demand for vintage stereo is unlikely to always remain strong. There's a point where like all vintage technology, except for a few iconic pieces, it will become too old, rare, finicky, difficult to maintain, or redundant for even its fans to bother trying to acquire and maintain it. Then -- like vintage lawnmowers and kerosene lanterns -- it will be quirky technology that's sought and traded by a few die-hard hobbyists, but not worth much.Vintage stereo is just like land. No more is being made. So prices on both are going to go up, not down. By how much and how fast up depends on how strong the economy is.
Personally, I think this whole vintage thing has peaked. Baby boomers are starting to thin out, and while the hipster quotient will keep things alive a bit longer, my gut tells me that those with disposable income and desire to obtain will drop soon like sh%$ty diapers.
But like chef free said, do it if you want to, and yes, I doubt you'd lose much money.
It's interesting sometimes to look at people's prognostications from years back. They'll "drop like Sh%$ty diapers", huh? Well, not yet, and it's mid-2021. It's insane, but they ain't making them any more and they never will.