yeah, i think it's going to take a while, but the "bubble" will burst, i've had almost no luck selling NES systems on craigslist the past few times i've tried, but a year ago, they were gone in a week at most.
i think a lot of it is just people wanting to play what they had as kids, and they'll be done with it eventually, and just want to get rid of it.
that's how i've got a lot of the "rare" snes games for as cheap as i did.