If it seems too good to be true, it probably is...
Also, some of the Amazon marketplace sellers do peddle fake goods (watches, toothbrush heads, razorblades etc). The marketplace is much like eBay in that sense.
Seems way too good to be true. A man came into our shop with this ad wanting a price match and we didnt honor it. I dont know how true it is, but i heard somewhere that g shocks were the most replicated watches.