Yeah, but I've noted when buying CDs on E-Bay that the sellers always have some negative feedbacks and, when you look to see what they are, it's buyers complaining about "the jewel box was broken." Oh come on?!? Jewel boxes shatter if you look at them to intensely. I would never give a seller a negative for that. Besides, as you say, jewel boxes are a dime-a-dozen (well, maybe a buck a dozen) at any office supply store.
But, if you are a seller, I'd advise packing well and adding some verbiage to your auction like, "The Jewel Box is fine right now and I will pack reasonably. But Jewel Boxes shatter if you look at them to intensely, so I can not guarantee that the jewel box will arrive in perfect condition. I'll try, but please don't give me a negative feedback if the jewel box gets broken."