Instead of buying presale packages I bougt some mining power on nicehash to mine DV7.
I did not get the low price from the first package sale that way but nearly, just paid 20 percent more.
But I have not been limited to 3 packages about 2000 DV7 each. Have some more now. 

With staking from the beginning I have been able to double my amount of DV7 until today. 

The trading price today is ok for me. I am nearly break even now.  Let's see where we will go from here.

With listings coming at other exchanges and someday on coinmarketcap.com, early sellers may regret selling too early.