I have a number of medium and large moving boxes plus some packing materials (clean newsprint used only once, bubble wrap, styrofoam worms) available to anyone who'll come and get them.  I have 13 brand new U-haul boxes plus others that were used only once and a few repurposed boxes in good condition.  Email to set up a time to pick them up.  (Yes, U-Haul takes back unused boxes, but only if you can find your receipt. . . so my loss is someone's gain.)