Yezz has started selling their higher end Windows Phone on Amazon.com.
$249 will get you a handset with a 4.7 inch HD screen, 8GB ROM & 1GB RAM Expandable up to 128GB, 8MP Camera with Flash & 2MP Front Camera, a 7.2mm Ultra-Slim Body and 3 Battery Covers (Blue, Red, White).
The spec is pretty similar to handsets like the Xolo WIN 900s and a variety of other devices which are selling for slightly cheaper, but presumably the advantage of buying from a US source is worth the premium.
See the handset at Amazon here.
Thanks TR and Arun for the tip.