I think the devs should share the financial stats with the community: how much money raised for listing at the moment, how much more needed. There are 23 new masternodes being set up since start of MN payments (now 63, it was 40 at the moment of auction). Where did they get the coins?
Regarding your question about how many MN have been sold. Only 3 MN and a fraction of one MN, others are still "reserved" and still no payed, ie sum = 3.75 MN of 10.