When you buy accounts, be realize every account could be recovered by the original owner, so be sure you can take the risk.
when you sell accounts, please take serious business, never recover accounts back after you get paid, you can only sell your own accounts that created yourself, it is harmful to buyer if you sell accounts that you bought from others, as if someday accounts get locked or recovered, you won't be able to help your buyer to get accounts back because you are not original owner, that is painful to buyer.