BT Shop has this Dell E173FP - 17" flat panel display TFT for £129 + £5.99 delivery charge.
Go through Quidco for 4% cashback which will nearly offset the delivery charge.
Dell E173FP utilizes a 17" Active Matrix TFT LCD that displays brilliant text and graphics with a maximum resolution up to 1280x1024 pixels. This monitor has wide viewing angles, which allow you to view the screen from various positions without compromising image quality. With a contrast ratio of 450:1, it generates sharp, crisp lines and images, while its fast response time provides superior clarity for moving images.