I bought these in May of last year, and have put only about 300 km on them (1 weekend of training to break them in, 4 TTs, 1 day of testing). The field testing that I have done with my trusty SRM indicates that they do indeed live up to their hype as "the fastest TT tire in the world!", with the pair saving me approximately 30 s in a 40 km TT as a result of a reduction in aerodynamic drag. As shown here, Trek's web price is $60, plus shipping (or local taxes, if bought through your Trek dealer):

http://tinyurl.com/aerowing

I'm asking $45 per tire or $95 for the pair, shipping included. Please email me at acoggan at earthlink dot net if you are interested.