Good news, we needed an exchange listing, so we know the value of the coin. I am personally not using Graviex so will probably wait for some other exchange. If I am reading that screenshots correctly, you will pay 2 MN plus 10 coins for listing on Graviex?
The first screenshot was from 5 days ago,It looks like they have changed their policy about listing so we are going to pay 5 MN + 30 coins as mentioned in the last screenshot.