If you want to have a donation level associated with a premium, say a book, and you have a set number of books to give out, you can set the donor limit in the donation level to match the quantity.
Some common questions we get around donation level limits are:
Will a donation level disappear from the public facing form, if the donor limit is reached?
Can we have an alternate donation level that would show once that donor limit is reached?
Answers:
Yes, the donation level will disappear from the public. It will no longer be displayed on the donation form once the limit is hit.
Yes, you can have an alternate donation level once the limit is reached. You can achieve this by editing the particular donation level and then selecting the Fee structure as "By Quantity". From there, click on "Add Fee". You will see that you can insert in amount #1 for the first amount, and then amount #2 for the next QTY.
Here is a screen shot:
