This segues into an important topic. That site could likely be selling highly accurately made copies from China. Rolex is by far the most copied watch, by they'll copy anything. Some of the better Rolex Submariner and Masters are so close now that only a good jewler/watchsmith can tell once they pull it apart. The movement, weight, color, all of it is SO close until you get into the guts of the watch with some of the Rolex and other copies. They sell for close to 1000$ sometimes, for these "Swiss grade replicas".
The price you'll get for a stainless Skyhawk from Amazon or any reputable retailer is very rarely under 475$, most are in the 500$ range depending on the model. Like I said, for a non stainless/titanium, there ARE sub 400$ models, but they don't look at all like the picture from the link on that site.
Just like pocket knives, watches are something that are copied frequently and sold at what looks like a still expensive price, but a really "great" deal, and this is the warning bell in many cases.
