Well I just became one of the fools that accidentally sells a large block of MH on Zenportal for $10. I was selling some Zens at $10.24 ($10.75 after GAW adds its 5% to sale price and $9.73 to me after it takes its 5% cut from the seller) the miners move every time one is renamed or sold and it seems that they moved as I clicked and I didn't notice so I sold a batch of Hashlets I paid over $1500 for at a total price of $9.73.
The hashlets were literally gone before my finger came up from the click which makes me wonder if the suggestions on hashtalk (long since deleted) that GAW automatically buys all these mistake sales are true.
That sucks. I do believe they auto buy at a certain price threshold as well.
I am thoroughly convinced that GAW buys hashlets when they are listed under market value. I put 80 MH/s up at $13 per mh/s when they were selling for $14 and before the webpage had gone back to my miner page after clicking the last accept button they were already gone so in less than maybe two seconds. Which means someone opened the market page, clicked pay, and clicked the last accept button in 2 seconds is just not possible.