i think certain bikes with a cult following will end up like semi classic cars from the 80's and 90's. Mazda Miatas, first generation BMW M3s, the 1990-1996 300zx, even the Honda CRX. regardless of how many were or weren't made or how low their prices got a few years on people just love these cars and they stay desirable. i can see any of the USA made CAAD frames, the Surly bikes, some of the new Bianchis, Cervelos etc having that kind of staying power.