Here is the rule for selling accounts here:
We don't pay instantly, you need to wait 7 days for payment after we sold your account,the account must be sold first.and we only pay by paypal. (like if account sold on 1st, Jan, you will receive payment on 8th, Jan) Sometimes, accounts may take longer days to sell, you will be unable to have it back till times up to 14 days since you sold to our site. But if it will not be sold in 14 days +, we will return it if you no longer want to sell it. And if the account get recovered in the future, we will report the account to JAGEX, and we will file charge back via paypal, you will lose what you get from the accounts.But as long as account is safe, everything would be okay.