I have 2 full sheets of this material. Each sheet is 4 ft by 8 ft, .250" thick. This is great for making sandwich panels, and can be thermoformed for contoured applications.
I suppose I could mail a full sheet, but it would be much more cost-effective to cut it up into smaller pieces. Small pieces can be joined in one part so it should not matter.
Asking $10/ sq. ft + actual shipping. Will entertain trades for other materials or consumables.