I have a used Sony VAIO VGN-FE21B laptop for sale (15.4" screen, 1.66Ghz Dual Core Processor, 1GB Ram, Windows XP). It comes with the power supply and all components function well.
The Windows version installed is French so you might have to change it to an English version.
The Laptop is clean and works well but has a chip on the side. Attached are pictures and a link to the technical specifications.
http://www.engadget.com/products/sony/vaio/vgn-fe21b/specs/