Many of us (myself included) use the Epson V550 or V600. They are very easy to use and produce great scans. An example is below. The 550 is usually in the $199 range and the 600 just slightly more. Whatever you get, the most important thing is that you buy a scanner with a CCD element, rather than a CIS element. A CIS-type scanner can only can flat surfaces, and it will produce a blurry scan if you try to slab anything with depth, such as a slabbed card. A CCD-type scanner has a greater depth of field, and can scan slabbed cards perfectly.
