I ordered one extra shelf. I forget what the dealer charged me, I think around $24.00 but in truth I don't remember.
After using the shelves I thought 4 was about right. Because of the top of the pantry you are going to have to drop down that top shelf for clearance to be able to get things in and out of there. I kept one shelf for tall things and then the other two shelves in the middle, once things were on it, seemed about right for spacing. It took more clearance to get things in and out than I had first thought by sizing up the size of the pantry looking at empty shelves. But then it probably depends on what you fill your pantry with. My boxes of cookies are tall and those chip bags need space.
