I was looking through the mobiles available around the £49.99 mark to use for the offer to get £20 voucher for Woolworths (thanks to littlerascalz) and I found this:

"The easy to use, 02 Motorola L6 is ideal for on the go and includes £20 Free Preloaded Airtime. Complete with a simple car kit, this stylish phone is accessorised with a Bluetooth headset, universal phone holder and car charger!

Features:
£20 free preloaded airtime
4 x zoom
10MB phone memory
350 mins. talk time
345 hrs. standby time
VGA camera type
Video recording
Car kit includes: Bluetooth headset, Universal phone holder, Car charger
SMS
MMS
500 address book entries
Games
WAP browser
Java enabled
Speakerphone
USB"

Usually the price for the car set is around £10 and you get £20 talk time + £20 voucher so the mobile is virtually free.
Can make a nice present for somebody and you can use the voucher to treat yourself :)

www.woolworths.co.uk

Check for discount codes to use at www.woolworths.co.uk