HAVE ALL SALES STOPPED ON AUDIOGON ???

I certainly have some funds to buy new but it's not kind of funds to be able to buy what I would want to. Besides, I might be interested in particular older models.
As for younger people, quite a number of them do have money, they just mostly spend it on other things or invest or save. They are also with some exceptions digiheads. When you are outside analog you are unlikely to become true audiophile. Someone would take this thought further - not only analog, outside of tubes there is no audiophile land.

Asians buy most of the stuff.

If prices went too low it would eventually destroy the commerce, wouldn’t it ? Or at the very least would greatly transform it.
If I wanted to sell, say, my Nottingham turntable/tonearm I would not sell it below certain point unless I needed money badly, I would keep playing it or put it in the closet.

Whatever else might contribute, I too think that the pool of audiophiles is shrinking. But that's not only regarding serious music reproduction, some other pools are shrinking as well. I am not optimistic.