Was a little bit sceptical after reading a few negative reviews, but then people only review when they're unhappy and something goes wrong...
My experience of cashmyfone was fantastic. The whole thing happened very fast and there was regular email contact to let me know progress reports, right up until the money went into my account. Fantastic. Also, the best price for my Blackberry Storm out of all the similar sites. Sent it free but obtained proof of postage. Will definitely use again