If you decide to purchase such advertised "loot", be very careful.
Greetings Daevas,
Although we don't strictly consider advertising and selling the rights to bind on pickup (BoP) loot items an exploit, we don't support the practice either. If you decide to purchase such advertised "loot", be very careful. Doing so often leads to unhappiness through mistake, or unfortunately bad intention.
Though our Customer Support Team is always ready to review any tickets you send about any Aion game issue, it might not be able to help you if you fall victim to a seller of a BoP item who has bad intentions.