A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
Fits 2012-15 NC700X. $70 + shipping from Atlanta, GA. I don't know how much shipping is, but it should be less than $20 within the US, based on other things I've shipped. Clip-on extension available for $15 more.