Grabbed these on eBay literally a few days ago (as new). Sound great, look great but alas, not the model I was actually looking for! Retail value goes up as far as £169.99 on some sites and 2nd hand tends to float around as low as £85 up to £100+ with box etc.
Selling with box, case, bag etc. posted insured (UK) for £70 [font=inherit][font=inherit][size=1] [/size][/font][/font]
The blue colour option also appears to be one of the rarer colours on the market for these headphones as well.
[font=inherit]Cheers![/font]