Question is, why are the charging the Retail Box shipping rate if there isn't a box?
Because there is a minimum that the shipping company will charge. Disc in a sleeve, or
'pretty box', the cost is the same. The difference is, you aren't being charged for the cost of designing and manufacturing that box, or the cost of writing, illustrating, and printing of a physical manual.
many of us are hoping that SD will release a downloadable and printable cover art of TA so that all you need do is purchase a DVD jewelcase and slip the cover art in.
From your mouth to Frogboy's ears.