I read it too, but I do not know why this forum allow such thing. They might cause two things which might also happened.  Account farming in which, person who is already a member (user) here will buy the account the and use it as his or her second account. And Scamming. The user might buy the account to scam others for his personal interest.
Although I don't know how it is modirated in the forum.

My advice to the buy, before he buys the account he should verify everything about the two accounts to avoid hacking and Police watchlist. We have to be careful of the online business we do. And the price place on the account is too low compared to the struggling of ranks in the forum. If the buyer buy the account with $1500 as a legendary account, he would gain that amount within 6 months to one year if he signed with a good signature.