Of course you will need a flatbed scanner. Both Staples and Office Depot keep small stocks of flatbed scanners on hand.
. I own and recommend Epson scanners and many here like the Canon units too. Either should serve you well. You can get good deals on Epson refurbs at their online Clearance center and often free shipping as well. Right now they have the V350 at a good price w/ free ship - it is considerably better than the 4180 which is at the same price. Deals can be found at Amazon or eBay too.
. Separate scanners aren't that big in the market any more as many are getting the multifunction printers now that include the scanner. Use the buyer comments on Newegg to find which models to avoid. I think there is a sort in order of review score. You certainly don't need a super high-end unit for your application.
. I would get one that is AC powered rather than USB powered as there is a limit to the speed you can get out of a motor that has only half an Amp at 5V available to it.
Canon generally dumps their refurbs thru dealers - pricegrabber.com will often find the Canon refurb as well as the new unit deals. Try Froogle.com too.
When scanning, use the lowest res and color depth that gives you acceptable results for your application. The higher the res and color depth, the slower the scan speed and the larger the resulting image file.
And when checking out buyer comments, remember that a negative experience will be much more likely to be reported than a positive one. I see a lot of the lower scores are from those who bought units not particularly well suited to their application. And, of course, from those who couldn't find their backsides with both hands...
And some models may not have drivers, etc. for Vista, so be sure before you buy if that is important to you.
.bh.