Extra large flat cardboard sheets for sale

We have 7 pieces of extra large 96" x 48" double-wall cardboard sheets leftover from a project. They are 1/4" thick and very strong. Selling for $10 each, or best offer. We used them to make cardboard furniture, but they are traditionally used as padding for shipping (see image). We spent over $100 on shipping alone for this size, so it's a bargain. Must pick up in Brooklyn before May 1st.