Argos have the Nokia 5300 on Virgin Mobile pay as you go for just £79.99.
The Nokia 5300 XpressMusic is a sporty slider phone with dedicated music keys, stereo Bluetooth, and a microSD slot supporting up to 2GB of memory! The sporty Nokia 5300 also features a 1.3 megapixel camera, FM radio, web browser and much, much more.
At the time of writing these are instock for both home delivery and instore pickup at all of the stores that I have tried.
Get it delivered to your home for £4.95 or reserve it and pick it up in store within 24 hours for no extra fee.
The 5200 is also available at £70 and the 6111 at £50.