Offer them here , so many are making postage stamp quilts! Stuff some flat rate boxes as full as you can get them , and list on the free offer section. You can have the receiver pay the postage. Just my opinion but 5 inches is way to big to toss. There is something about making scrap quilts that has an appeal all its own. If you look at some of the beauties posted in the "scrappy quilt" show you will see its quite popular. And may inspire you to make use of them.
Do take a photo to include in your posting that way , there is some indication of whats in the box.