i agree with you it's a class act. on eBay some include box.
I have an ideal why, they probably don't throw it out as much as keep
it and send the graded coin with out the box to save money on shipping
for the buyer. I could be wrong, but just a guess. They might also be
planning on later selling the box to someone on eBay who doesn't have
one, kind of like what they do with empty proof and mint boxes.