Leslie:
Here is the Amazon.com link for my scanner:
http://www.amazon.com/gp/product/B000RUOW66/ref=cm_cr_pr_product_topIt gets 4.5 out of 5 stars with some excellent reviews. Now, I haven't scanned 5,000 charts with it yet, so I can't speak to endurance, but it's a very neat little scanner, and it's a third of the cost of some high-volume scanners.