Remember that rush of Espon 836XLs that was on bigscanner.com a while back? They sold out quickly. But right now - and ending tomorrow - they've got an Epson Expression 1640XL (roughly the same thing) for auction or buy it now for $499.
If you've wanted a big scanner and haven't wanted to deal with the cheapo Mustek A3's, this is your chance.
(I'm not the seller, I just saw it and thought people should check it out.)