These used stock NEC 20" TFT Monitor's are £99.99 at BigPockets [£106.98 Delivered!]. They come with a 30 day return to base warranty.
Features: Manufacturer NEC Multisync LCD 2010X
Screen Size 20.1 Inch TFT
Resolution 1280 x 1024 maximum resolution at 60 Hz
Connection DVI and SVGA (Cable included)