We got our hands on the cool and gigantic iMo Monster 10-inch USB monitor for review back during the summer and if you have been lusting after one for your own, this may be the time to buy. The company that sells that big screen and several others is called MimoMonitors and it is having a sale for Halloween that ends a midnight on the 31.
While the sale is running, you can grab that big iMo monster screen for $234. The screen has a resolution of 1024 x 600 and needs a single USB connection. If you need something smaller the iMo Touch 7-inch pivoting LCD is available for $162 with a resolution of 800 x 480 and it supports touch input.
The Mimo 720-S is $180 and is a foldable screen designed for portability. The 710-S is the same as the 720S minus the touch capability and sells for $118.99. The last of the screens on sale is the 720-F, which is the same as the 720-S but is mountable with a VESA-75 stand selling for $180.