Thx for your answers
Looks like someone withdrew around 7k from Just-Dice and sold it.
I see people in the Just-Dice chat complaining about how they feel betrayed by such behaviour. But shouldn't people be allowed to sell if they want to without incurring our wrath?
Sure they should be allowed. In fact those complaining complain only because the worth of their own clams are dropped and they can't sell it anymore now for the higher price... for the moment. So it really is not worth a complaint, when one would have no intention of selling at one point in time, which no one can say of itself, then it wouldn't matter what the price is. So these complaints are only saying someone other dropped my potential selling price.
Well, now it is a buying price.
Though i think for a seller it would be smarter to do a public auction or something. There are enough people who would buy and most probably this person would receive way more than he would by dumping a big amount of clams on an exchange.