Fully realizing that something is worth what a person (or sucker) is willing to pay, I wonder if anyone has any feelings or suggestions about the real value of a 10, 15, or 20 year-old piece of new, but old stock engine. For example, imagine an old TMCC scale engine that a dealer is selling but a Legacy scale equivalent has been introduced by the same manufacturer since then. Or, say, a 15 year-old PS2 engine is on a dealer's shelf but a PS3 equivalent has already been introduced to the market.
My personal feeling is that the new old stock is worth about half.
Just asking because we're seeing quite a few technology advances here. LC+, for example, was upgraded to LC+ with Bluetooth and soon to be LC+ 2.0.