I've been going through some Chinese Audio Websites, they have a lots of vintage American Made Speakers for sale and they seem to be loved. As an example, it seems like used speakers that would sell for around $1000.00 USD are priced 3-4x more over there. In the early days of the forum some California Members used to talk about containers full of used equipment getting shipped overseas. I have a feeling they don't have a hard time find electronic techs to fix anything either.
As far as the flippers, a lot of these guys saved the hobby, there was a time 20 years ago when most of the equipment was considered boat anchors and getting buried at sea. There is no way there's enough of them to drastically change the hobby, remember they made millions of pieces of equipment. My work gets me into locations where I see vintage equipment; you want to see something sad, go to the dump drop-offs (transfer station) in the city, look in the electronics section, all kinds of equipment that probably didn't get sold at the yard-sale. Of course they won't let you touch, take or buy any of it for some wierd reason unless you have a buddy working there.