I'd say that the Miura is already considered a collectors car and a showpiece. The Countach slowly is catching on, but that will be tough for a while still.

Beyond that, I don't see any other Lambos as collector cars anytime soon.

eBay is a horrible barometer for selling prices of cars unless they have a buy it now. There's too many factors such as mileage, history, color, even for each year.

-Ben