Buy from a seller with 100% positive feed back, preferably with over 50 transactions, but not in the 1000's, that can prove they are genuine with the receipt from Sammy like I did. Absolutely 100% genuine and link to the app and receive the Sammy updates which the fakes don't. I agree there is a few toe rags on the bay so just do your homework & don't be a schmuck. I paid £51 & couldn't be happier with mine.
I personally wouldn't buy from ebay, far too many fakes
loads of convincing fakes on eBay too and from wish (fierce)
Loads for sale on ebay due to Sammy giving away as part of a promo they did. Selling for roughly £45/50
Also if you buy from Curry's you can submit the price match if you aren't a prime member or prefer to buy from Curry's I guess