how much unity assets paid?

I have decide to make modles and sell them on unity assets but before that i have some questions.
Let’s hit an Exemple, I sell a Modle for $15, I get 10 peaple buy my modle, Will i wait one month to recieve my payments? Or i will recieve them whenever someone buy my model.
Will most developers have the ability to buy an important asset, like characters modles?

This should answer your questions.