Phones4u.co.uk have just dropped the price of the Nokia 6300 to £99.95 plus £10 top up.
i bought one that turned out to be faulty last week for £119.99, so took it back today, and got a refund. Ended up walking out of the store with two for £99.95 each.
Phones4u.co.uk staff can give a maximum of £10 off for each pay as you go or £20 if you take out insurance as well - Therefore you get the phone for £99.95 AND get a free £10 top up.
All you need to do is go in there, tell them you want one, but you are put off by the top up, ask them if there is anything they can do and they should give you it free.
Also as an added bonus, go for the Vodafone one, they are UNBRANDED and UNLOCKED straight out of the box :)