Product purchase dependency requirement

[LER_Steve]

Hi,

We have been working out a way to insure that a series of "Products" could be purchased on our website but require that they are purchased in order. Example: Course3 can not be purchased unless Course2 has already been purchased and can not be purchased until Course1 was purchased. Has anyone had success setting up a course dependency chain like this?

[Rayjak]

I am looking for the same thing.