Just bought the Huawei G300 (U8815) from Very. Price £99 and locked to Vodafone. However if you go through Topcashback they are offering about 6% cashback. Although not guaranteed, it's worth a try. (Topcashback is free to join. Here's my link if you want to use it http://www.topcashba.../ref/jewelqueen
). Add the code 23EPW at the Very checkout which is valid until 1/8/12, and this will give you £30 off Orders Over £60 when you open a Credit Account at Very. You then just pay off the account in full when it is due, so no interest to pay. Cost so far Is £72.95, plus a possible £4+ cashback from Topcashback.
I then needed to get my phone unlocked as I wanted to stay with Giff Gaff (on O2 network) as they are much cheaper. Not having a Vodafone shop nearby I opted to use e bay (unlock fusion) for £4.99. They did take more than 24hrs to send me the unlocking code, however it worked first time with no problems. If my cashback comes through to Topcashback from Very then it will nearly pay for the unlocking cost. So, in total my outlay will be just over £73.
I'm rubbish with mobile phones so I wish to say a big thanks to everyone who has contributed to this thread to help give me the confidence to try unlocking my phone myself. Good Luck and I hope my post will help others.