Just checking out shoppingexpress because of the $1 USB drive and found this.
Cheapest so far for local stock, $10 delivery to my area in Sydney.
Asus Transformer Book T100 10.1" Tablet PC,Intel Atom Bay Trail,Z3740 Quad Core(1.33GHz up to 1.86GHz),2GB DDR3,64GB SSD,10.1" TOUCH IPS(1366x768) (16:9),BT4.0,Intel WIDI Dual Band 802.11a/g/n,webcam 1.2MP,Keyboard Dock, W8.1 32bit+MS office 2013…
Not a bad deal
I have ordered one from B&H website in US and I paid around $484 include delivery (UPS)
but with $495 and having an australia stock, I think it worth to get one!