We have found that yoyoharry1 has been selling diamond ores in one of his shops for 3 vT each. Furthermore, we found in his possession more than 10,000 diamond ores. He was selling gold for 3 vT, and had at least 500 gold ores in his shop. He was selling iron ores for 1 vT each, with at least 120 in his shop.
In fact, his shop was themed out of diamond blocks, and he had a second mall shop which led to his second shop. It also had more diamonds to sell. All these blocks for a ridiculous price. He doesn't even have the ability to TinyWE....
In total, we found more than 10,000 ores in his possession. Was this due to a dupe bug? At any rate, he is banned until he can explain the reasoning for all these ores, and how they were obtained.
Furthermore, I'd like to know why you were pricing them so cheap.
Why would he sell diamonds for that cheap?
Update 4-26-2012: The IPs were similar, but not the same. The players must have been in the same vicinity. This is an error on our parts, but we assumed that yoyoharry1 was using the other accounts to harvest blocks. I believe the story is accurate, and that only yoyoharry1 is to blame.
I cannot do this action just now, but all the other users will be unbanned. yoyoharry1's ban will be modified to expire in 4 days. yoyoharry1, understand that this is exploiting a bug, and has very serious consequences.
If another admin gets to this first, please do as I asked and unban the other users. I am really sorry for this mishap. We had limited data, and had to run with a hunch instead of actual fact.