They initiate the trade, you do not release the coins until they send you the account information and you have satisfied that you can get in and will not be screwed and there you go, messy but safe.
Yes that a good way to offer the seller if for some reason you or they are not willing to take escrow. Otherwise, i would recommend taking any of the trusted escrow for this. Also be careful if the person selling account is selling legit account or some cracked accounts as there a lot of sellers on this forum selling all kind of cracked accounts.