Acer Extensa 5513WLMI
Intel Core 2 Duo T5500 (1.66Ghz, 667 Mhz FSB, 2Mb L2 cache)
15.4" WXGA Acer Crystalbrite LCD
1Gb of DDR2 RAM (can be upgraded to 4Gb)
120Gb hard drive
Inbuilt XD, SD, MMC, MS card reader
4 USB ports
Originally came with Vista Home Premium (product key on base) but currently has XP SP3 installed. Will run Windows 7.
Comes with bag and power supply and USB mouse.
The only problem with it is that the left touchpad button is loose and doesn't register a click. It may be fixable but is a bit of a pain to dismantle, so I've just generally used a mouse or tapped the touchpad to select.
Same model on Ebay recently sold for £127, so feel free to make an offer.