I am sure the 10k whale ain't buying back, but decided to cash out exactly 10,000 btc last time, which suggest he has more btc in reserve
Now i can only guess that he turned bear and fearful with Gox demise..
The sell wall originally was 10kbtc, although I believe he actually marked sodled about 5700 btc (you check bitcoin wisdom on 15m time interval)
He might have been selling small amounts upfront or afterwards... don't know