Fill out the box buyer form with all of the necessary information. You can add the date you need the boxes by and what the boxes will be used for in the additional information section. A three-wall box is considered middle ground that meets that needs of many applications but are not quite considered heavy-duty. Gaylord Boxes for sale with four or five wall layers are the most robust on the used market and meets needs of most customers’ needs. They can hold heavy materials such as plastic regrind or other bulk materials with a typical capacity being around 2000 lbs.