I'm closing this guys, too much talk of duplication / exploits, only a matter of time before people start asking "how" and discussing how to exploit; which is against the ToS and thus against our rules.

To the OP I would be very cautious about buying these items at the moment if it seems fishy, it probably is. Report them, if they're exploiting, they will probably pop up on another level 1 - but Blizzard can use the data to hopefully track down and squish these exploits.