i sold my wow account last month, i had a level 70 mage and a chinese website offered guaranteed sale, i was very very sceptical and remained so throughout but as i wasnt really bothered what happened to the account and didnt think i could sell it anyway i gave it a go.
They gave me $100 for my level 70, despite the expansion and it being 10 underlevel. They added me on MSN, i gave them all the details of the account, told me they would pay via paypal in 10 days for security reasons, i was like, oh nice ive been scammed. Anyway 10 days later i spoke to the guy on msn and he replied in his dire chinese, hold on while i verify. Then he asked if he could phone me from China, i was like.. are you paying, he said yes. So i answered the phone, he asked me 3 questions, name, paypal account email, and a secret question i had to make earlier. Those 3 questions took 5 minutes because his english was so bad, it was soo soo painful listening to him and saying 'sorry, what?' over an over. But yeh, he hung up, 5 minutes later their was $100 in my paypal which i spent a few days later.
I dont know whether i reccomend them, everything went dead smooth not sure what would of happened if there was a hiccup, but if you need a sale for your account they will probs give you $200-$250 for it no questions asked. The website was accountsbay.com i think. Worth a look, dont be put off by the fact they speak dog**** english.
If you know how you can get every last detail even down to your cd key changed if you so wish.