DeLorean DMC-12, 1981-1982 (John DeLorean)
Dornaus & Dixon Bren Ten, 1983-1986 (Jeff Cooper)
Apple Lisa, 1983-1986 (Steve Jobs)
Can anyone add to the list? Only technically impressive, failed technologies from the 1980s are allowed. Bonus points if they are overpriced, sought-after by collectors, and considered "toys for the rich".