Just passed my local Virgin Shop and saw in the window that existing XL phone customers can have a free Blackberry 8520 on a 24 month contract for £7.50pm!!
The offer is 100 minutes, 500 texts and Blackberry Internet Service (others charge £5pm) all included.
Signed up and half way through sign up options it turns out that the only deal available for him to enter was coming up and priced at £7.15pm.
Total contract price is £180 (if you get the same deal as me £171.60). Phone alone must be worth £100, so works out at just over £3 per month.
Existing Virgin XL phone customers only though. He was able to confirm my details on his computer.