I've always felt strongly about being a little gentler on the environment so I have leaned towards using as much recycled material as possible when I ship artwork. I re-use plastic, bubble wrap and boxes as much as I can. Earlier in my career I was told that it was important to package professionally, but I felt too bad to use all new materials, especially since I had access to recyclable items. My pieces are still well packed, just maybe not as pretty as some and, so far (after 20+ years) I haven't had any issues. I just make sure edges and corners are well covered and that the cardboard is well marked 'FRAGILE' so that heavy objects are not placed on top of them. It's worked so far, and I definitely feel better about my choices. Plus, this way I don't have to increase shipping costs to cover those unnecessary expenses. It's a win-win for everyone.