It still happens, but it's getting rare.
I got interested in vintage washers in the 1980s. I was getting unhappy with the current crop of kitchen appliances, and discovered that a buddy of mine had been acquiring period-correct kitchen appliances for his 1940s home and doing ground-up restorations on them. He got me thinking about my mid-century place in Palm Springs and once I started looking, it was easy to find what I needed on the curbside, behind appliance stores, and second hand stores. You almost tripped over the stuff.
The desirable stuff started getting sparse about 2000 and now (2018) the good stuff is getting rare. You still do see it, but it'w now a once a year thing.
One of the worst things to happen was "American Pickers". When I do see something I'm interested in, I frequently have to deal with an owner who thinks because it's from the 1950's, it's worth a bundle. Mad Men you know... If it looks like there's no hope for an agreement I give them a card with my name and number. I also mention that yeah, it has more chrome and porcelain than anybody's business, but it also has impossible to find 50 year old rubber and electrical parts and it's not worth what's being asked.