So, i am selling some Capital Sentry Damage Augmentor I's and up there is a sell order for 2 items at 30m each, way below the other sell orders. There were no Buy orders. And the sell order price at Jita is 58m and the Buy order price at Jita is 55m.
So, clearly this looks like a mis-posting.
I suspect one of two things happened:
1. the poster tried to sell some of the items at 30m to an existing Buy order which was unable to cover the full volume (i.e. a buy order to buy 3 of the item was up but the seller tried to sell 5)
2. or the seller in this case meant to post a Buy order for 2 items at 30m
Either way, i took advantage and bought the 2 items at 30m to repost later at a higher price.