I was lucky (I guess) when I started losing my sight and put my quilt books up on ebay many were still selling. Now, as noted, people generally want ebooks or pdf patterns so they don't have to store bulk books. Most of mine sold, some for lots, and I was happy with the outcome. Today I wouldn't bother, but you Should sign into ebay, do a search for Quilt Book, and then go down the left to Sold items. then use the drop down menu to select highest price. You'll see by scrolling what is sworth putting up
Gee's Bend, $1200.00... most? unsold.
books that weren't worth my time I donated to the local library sale.