Canon Canoscan LIDE 20 Desktop flatbed scanner. Powered directly from the USB port. This is what Canon say: The CanoScan LiDE 20 is the ideal scanner for starters. It's easy to install
Canon CanoScan LiDE 300 Slim Color Image Scanner 2995C002 B&H
Canon CanoScan LiDE 50 USB Flatbed Scanner LED F915900 UNTESTED | eBay