Yes, some of the old quilts are worth as much as you think, or as much as you can get when they are sold.
Once I fell in love with a crazy quilt about the size of a lap robe in an antique shop. My DH told me that I could make one even better than that, but should I buy the antique, all I would have was a pretty piece of quilting that was too old to use or even handle much.
So I made myself one, step-son's bride fell in love with it so gave it to her/them for wedding present. She loved it so much she kept it in the divorce!!!