It happens.
I recently watched a pair of buttery smooth M750 hubs I was selling (with skewers) go for $7.50.
But, that same night I also sold a pair of blue Mavic open pro rims for $244--way more than I expected. Plus, like most of the people here, I've been on the buying end of quite a few killer deals.
Hopefully it all sort of evens out in the end.