675 Arrow Exhaust Ebay

Hi everyone am looking at getting an arrow exhaust for my 2016 street triple and came across this on eBay, listed as brand new and only £275..... Whats that all about?

http://www.ebay.co.uk/itm/TRIUMPH-S...027369?hash=item3f836ef7e9:g:Ou4AAOSwXY5ZVQ3E

And how much is it for the remap from triumph dealership?

 

So Would i get away with just the £250 silencer only then? Obvs plus the remap

 

Nice one, I'll get one ordered! Just couldn't get me head round why they were that cheap when they are 500 odd quid from triumph.