Just taking a quick look through the feedback for that seller on Amazon - there is one in there saying they took their watch for authentication and it was shown to be fake. They got their money back from Amazon but no response from the seller.
There's a major watch retailer on Amazon and eBay that's known to sell fakes, this listing looks a lot like theirs. Someone bought a Gulf F1 recently from them and found out it was fake. I'll see if I can find the thread from a search
EDIT
Ah yeah it was earlier this year in the "is my TAG authentic thread"
The seller is Watchingo - repeatedly Watchingo sells fake watches.