I have no idea if this was just a local sale at the particular store I went to (as such I listed it as a YMMV), or is part of a larger sale, but all of the booklights were 50% off list at the Waldenbooks I visited. :D

I picked up this one (http://www.mightybright.com/Book_Lights/25/ProductDetail.html) + an A/C adapter for $11.