I remember Shutterbug ads from 35 years ago where prices for Leica, Contax, Nikon RF were going into the stratosphere and a number of dealers at shows were saying- 'a Lot of those cameras are going to Japan and not coming back.'
I think a lot are coming back now. Makes me sad that the young generation of Japan has lost interest in collecting cameras, but it means the prices are back to 1980s levels for some of these items. Mostly the ones that are known to collectors, but not gained "Cult" status. Judging by the amount of vintage/collectible equipment on Ebay from Japanese sellers, I think the US market is big. I mean after all... I've probably bought enough to have kept the market from collapsing.