Dont forget the 120k plus bitcoins that russ ulbricht and the govt agreed to sale. This was agreed to a month or two ago. So, 120k plus coins hitting the market would def bring the price down.. not only that, the original coins that were seized were also going to be converted to fiat..
Those coins are still in the same address. They have not been moved. They probably can't be moved until after the trial is done with and he is found guilty (potentially years).
Even then we have no indication of how those coins will be sold, so we can't tell for sure if it will drive the price down. The US gov dumping them on an exchange doesn't sound very likely. An auction of them all at a fixed price sounds more likely.
All of the press releases about this right now are just posturing.
It would be good to see a transaction id for the other sale that is mentioned.