Peripherals Looking for a ADF Scanner

Im in the market for an ADF Scanner (Auto Document Feed)

much like this http://www.amazon.co.uk/Plustek-631...O9CU/ref=sr_1_4?ie=UTF8&qid=1317642109&sr=8-4

however im looking for cheaper options

any help will be rewarded with Much Rep

thanks guys

oh thought i would add i have no interest in all in one's