Raining Manastones?

[Dunes]

Okay, I don't want to trigger any RnF replies, hate mail from sellers, etc, but why are there SO MANY Manastones for sale right now? Without exaggeration, there are 5 for sale in the first 2 pages of EC Tunnel forum. Considering the perceived scarcity of this item, even on P99 where it was farmed far more than it ever was on Live, this seems a little fishy.

Legitimate and Serious Question: Do items have a unique identifier assigned to them when they are looted? If so, is there any way to check these things to see if they have been duped or somehow replicated?