This NavMan Bluetooth GPS receiver is £17.61 including VAT. Make your order up to £30 and you should be able to use the Google Checkout for £10 off. Otherwise it's £21.08 delivered...
* NavMan 4400 12-channel Class 3 Bluetooth GPS receiver
* Powered by 3 AAA batteries / up to 30-hour operation
* SmartST 2005 navigation software / Tele Atlas maps / 4-step setup
* Please view the user manual for more information