Just my opinion (others would have much more experience) -
If that is the only reason I would use the normal med or deep and make nucs up. Up here (and from what I know, everywhere) you are expected to return the nuc to the seller -or- provide your own nuc for the seller to place the frames in. Cardboard nucs seem to be use a lot too.
I think you might run into problems of people not wanting shallow frames - since they will usually end up in meds or deeps.
Just my opinion though,
Mike