I've purchased quite a few parts of eBay and encountered this quite a bit...
Packaging tape on attachment boxes/kits. In the description the box is beautiful clean, and usual as found when it arrives has packing tape on it to keep it shut.
On plain plastic boxes they're covered in sticky residue, on boxes with a printed design it tears the design.
And for me the box is part of the charm.
Bah this one has got me all out of sorts, so I'm hoping some eBay sellers will spot this and stop, an elastic band, or layer of paper around the box (inside a padded will do the trick...