Yes exactly. Is there a guide available for people that are interested to buy Bitcoin accounts?
there is no guide, you have to be able to recognize scammers on your own
although there are some good sticky topics on the matter on related boards it is good to read them
Prevention is better than a cure. Please escrow.also you have to ask for signed message from an old known address in addition of using escrow.
note: the signed message should include the date the account was bought/sold, and that ownership of the account being traded was passed onto you. this will prevent the seller from trying to claim the account back in the future with a signed message claiming it was "hacked."