i think there is a lot more people interested in amigas than you seem to assume. in my area of the ny i know of at least a half dozen active amiga people. some of whom are here on amiga.org. amigas posted in papers are snatched up same day. and ive seen ebay ads from my area.
the c64dtvs sold thousands of units not all of which were to c64 enthusiasts. an amigadtv would probably do at least as well.