It was 1991. Lee HyunChang, a professor I met in a SIG in KETEL for non IBM-PC compatible machine users. He explained about a parallel computer he designed and built using abandoned Apple II board from Se-Woon market in Seoul. At that time, there were lots of duplicated Apple II+ boards which were dumped, because 8-bit era was ended a while ago.
He sold the Apple II+ parallel computer to a department store, as far as I know, for their own use to control a big clock.
I didn’t even think whether I could something like that here in the US! ( even though it’s on the Internet. )