They are buy able at max now. although buy it quickly buy it because the price will probably go up again and then you can re-sell it for a good profit if you want.
I bought mine for mid about two months ago when it was 106M and now it's 91M - but I'm sure it's going to skyrocket some time soon, so I'm keeping mine for now, you should probably do the same.
Masks have been buyable below med in GE for the past week or so.
You can always check the Masks discussion thread on RSOF - people post there when the buy a mask, and they post how much they bought for and how long it took to get it.
I think plznate is wrong, i have been merching hween today.
Since The last update of green hween which was a big drop of -4m greens have complete turned.
They went from min at 84m to now being around 89m!!! Be careful because they are not very stable and i dont think this rise will last for that long.
No, you cannot get one for max in ge as of 11/3/2010 I just tried, only to answer this thread and you cannot. As stated above me, they are probably on the rise again after they were dumped.