Scanners - no, not the type that live in vain - are something I use fairly often, and I've picked up a proper book scanner at last, a Plustek OpticBook 3600; the scanning area starts a few mm from the edge of the scanner, so you don't have to flatten the book completely to scan a page. Got it on ebay last week, it arrived today and it's pretty good.
My plan at the moment is to use this for most OCR and keep the HP scanner with the clear top for awkward jobs - pages printed askew etc. - where the ability to see how the page is aligned is particularly important. If I don't seem to be using it I'll probably flog it sooner or later, but not quite yet.
My other scanner (yes, number three) is a Canoscan D1250U2 which hasn't been used in a couple of years and is definitely surplus to requirements - it's a fairly bog standard USB2 flatbed, about ten years old, and was working fine the last time I used it. I really doubt I need a 2nd backup. It probably isn't worth trying to sell it, so does anyone know of a fannish good cause or especially deserving case in the UK that can make use of it? E.g. an SF convention or something? It has a Windows driver disk and a power supply, I may be able to find a USB2 cable for it. I think you can get Mac and Linux drivers from Canon's web site.
later - a friend has asked for it, I'll post again if that falls through.