Stop and think about how you would feel if someone were to find your quilts and just cut them up. And they would survive it, but crocheted afghans won't. I crochet, and have made quite a few afghans for friends and family members, and I would never attempt to cut one. Keep them or pass them on to family members who would like to have one. I am sure you will find takers. Don't sell them cheaply at a yard sale....even tho I have to admit I have taken advantage of the people who do exactly that with their family quilts.
If they don't want them, I give them a good home.