If you want to pay new price for very sturdy shipping boxes, try the cargo company on the west corner of the B-Ring Road - Al Matar Street Intersection. They have very sturdy shipping boxes for reasonable prices. For the record, if anyone is looking for large woven polyethylene cargo bags, you can get them at a few hardware shops in Souq Waqif. Please let me know if better prices for these bags might be found in the industrial area.