[judk]

How do you get to 300M? Is is possible that someone like University of Phoenix might offer $1B for the company? If so, might it be accepted? If so, how much are shares worth?

At my old job, whenever investors bought in they offers to buy out employee shares at the stated valuation.

[rdlecler1]

Yes possible. It's possible my $2 lottery ticket will also be worth $100m but until it is, it is still worth only $2 or maybe even less. Until then the value of each share class is not the same and so it would be a mathematical mistake to calculate valuation as the sum of all shares multiplied by the highest price paid for the most senior share class.