I've got a virtually new Arai GT-R helmet to sell, it's size 59-60cm and is *just* too small for me. I wore it once with a helmet liner. Got the original box, and helmet is completely unmarked "as new".
I paid £180 for it, so happy to sell for that price (as I need to buy another larger one!)...
Private: For Sale R32/R33/R34/Skyline/Stagea PARTS
Mint Size 7-7 1/8 Limited and Exclusive GT-R Branded Aria Helmet for Sale. Handed out to the first 500 customers. Still in original cloth branded bag and original box.
For pictures please see the following post on Ebay.
Limited Edition GTR Helmet on eBay (end time 22-Aug-10 21:00:21 BST)