I know everybody's excited about handheld scanners these days, but I have to say I'm underwhelmed so far. If you're determined to get a handheld scanner, you might want to consult this overview is written from a genealogist's perspective.
What else is available in the scanning world? Nearly anybody with a multi-function printer has a scanner included on their desktop, but what if you want to travel?
use a small, lightweight, and very portable scanner I bought a couple of summers ago
for a big research trip. It has all the functions of a desktop scanner and eliminates the need to knit together digital scans of larger images. Its
portability makes it invaluable when visiting relatives and it also
works nicely set on a coffee table so you can scan while you
watch TV. The model I use is the Canon LiDE200 Color Image Scanner – $80 at Amazon. It weighs three pounds and comes in its own little cardboard box with a carrying handle. I'm impressed with the quality it produces and it's held up under many many trips at this point. For $119, there’s a faster, newer version of the scanner available – the Canon CanoScan LiDE 700F Color Image Scanner.