To note, the rotation on the staves goes from stave to stave, with different mules dropping a ton on the market, terra's is just the most recent. While Jupiter's / Auster's have already been hit and not recovered (waivering around 500k for months), terra's was steady just under 700k per for quite awhile (Yes still higher than your zeth).
The price drop I mentioned happened over the period of 10 days - 2 weeks...I had put one Terra's on the AH before I headed to NY, for 680k (1 on the AH at the time. Two days later I checked ffxiah from the hotel to see if it had sold, and ffxiah listed 9 on sale. I hoped it was an error with the system, but alas, it twas not. The same thing had happened to Jupiter's / Auster's as I mentioned, I think at one time there were 13 jupiter's up at once.
I just really don't see how this profits them, besides driving others out of business. Smart WW'ers look for the 1/6 break even ratio (cost of hq's to cost of supplies), and Terra's went from 1/6.5 to 1/4.5 in like I said, 10 days.