Good luck getting millions for a dragon egg, people simply don't have that much money to be frivolous with these days.
Def worth more than a pwarp...
Back in '14 dragon eggs were added to meepshop, over 100 were bought, me/staff at the time only tracked down and removed about 46. The rest were hidden very well, considering how many of those who (I suspected) to have them, had intimate knowledge about how to properly hide items in '14(hoppers), I must deduce that there are still a dozen or two illegitimate eggs as well.
Since they know they can't sell them the conventional way, you've never seen them, but they do prevent some of the richest/most veteran players from caring to own one.
Pretty sure summers wanted to drop it in lava anyhow.