Good packaging isn’t a need reserved only for fragile items—nearly any box sent using a major shipper is likely to be dropped, kicked, bounced, run through harsh machinery, and otherwise abused on its way.
When packaging an eBay purchase for shipment to your buyer, you should always take care to:
Use proper packing tape. Use the clear plastic shipper’s tape or packaging tape in large quantities. Don’t use other varieties, and don’t skimp.
Protect your item with plastic. Place a plastic bag around the item to seal it from any exposure to the elements, using a silver anti-static bag if you are shipping an electronic item.
Use bubble wrap rolls for primary protection. Wrap the item in at least one layer of bubble wrap, large or small, with bubbles intact, using the pink anti-static type bubble wrap if you are shipping an electronic item.
Use foam filler for secondary protection. Fill all empty space in the box with peanut foam—if possible, the environmentally sound foam made of vegetable matter, or pink anti-static peanut foam if you are shipping an electronic item.
Choose clean, strong cardboard boxes. Use unmarked cardboard boxes whose listed burst strength is greater than the weight of the item it will hold.
Affix the address permanently. Clearly address your package using a printed adhesive shipping label or a permanent marker