It raises a... nay, the burning question for our time:
What does one do when the DVD comes in a cardboard slipcase that completely duplicates the protective DVD case, thus rendering it redundant? Does one discard it, or does one seek to preserve the holistic essence of the thing?
Monetary considerations do not apply, since the potential collector's value (even if such a thing exists for a mass-produced DVD) is negated due to the opening of the package.
Truly, a vexing problem.