Hi Guust,
I just discovered that payment behaves differently by going through GD checkout documentation.
If I am reading right, user adds a listing and then is directed to checkout if uer has selected a paid plan for created listing.
For some reason, I had an impression that users purchase a package first that includes listing plans and quantity.
Once purchased, user can creates listing based on available quantity and plan.
That is the reason I got myself thinking of setting up plan purchase page.
Please enlighten what is correct.
Thanks,
Amit