I'd say C9.5 would be something of a rare find for such a collectible piece. I know transformerland has one of these little guys in stock once every 6 months or so. Each time they sell instantly for $90
http://www.transformerland.com/store/search3.php
I reckon $90 is a fairly reasonable price for Bumblejumper. A quick ebay search will also support this price methinks. Though if you're not willing to fork out that kind of money on just one little figure, can I suggest keeping an eye out for minibot lots? I've seen a couple of auctions in the past few months with a bumblejumper in it.