If the people who saw it here stopped at the ebay number and went to go bid crazy, they spent too much. I have seen quite a few Blade Runner items jump up on ebay recently. So I think it is part of a greater trend outside of the RPF. BR is seeing a bit of a resurgence after the DVD set being released, and being in the news.
Just adding "Blade Runner" to an auction title is also something I have seen on ebay for years to help get a bigger bidder response. Of course just adding one or two more bidders can help drive an auction through the roof, even if they themselves don't bid all that high.
I may have to put some of my extras up an Ebay. I usually keep things like that for trade and such, but I have seen cheap crappy broken BR blaster resin kits go for over $100. After Christmas all these prices might fall again.
Andy