Up for your consideration is a VISTAQUEST VQ HS 500X Portable Scanner. Scanner is new but I did have to remove it from packaging to test the device. It is working properly.
Specifications:
Image Resolution 300x300 dpi for standard and 600x600 for high resolution
Automatically powers off in 3 minutes
Scanning status LCD display
Automatic white balance
System requirements:
Driver free to download for Windows XP SP2/Vista/7 and Mac OS 10.4 or above
(direct plug-in driver installation not required)
Accessories:
User's manual, USB Cable, 2 x AA Alkaline Batteries, Software CDs .