I'd seen this forum somewhere else, not on this site.
Umm.. well, Airtreks are kinda advanced in-line rollerblades with two sets of wheels front and back instead of the usual four, and they can fly. They're extremely heavy, extremely cool, and expensive it goes without saying. i mean, they would be expensive if they really were out.
so, if you ask me, i'll say that i'd kill for a pair of those babies!
I would pay whatever it takes. Air Treks are so useful.