Yea, while I do understand where you are coming from and would prefer to see nice bikes preserved, it's a fact that people are going to buy and part out bikes.
Regarding the plastics, I highly doubt the ones from this bike are in bad shape, yet we have no idea whether he is keeping them or if he simply hasn't listed them, or if he sold them locally.
Who knows, maybe the U.S. will actually make it through the next dozen years, we'll find a way to right the economy, and if so these bikes will get more and more rare and prices will skyrocket.