Its funny how the cost suddenly jumps when TT designate them as exclusives, isn't it?
While the base costs may be the same ( which after the 1st run should be streamlined anyway) everything else isn't.
You're not investing in R & D, you're using less raw material, less packaging, less man hours, you're not creating new moulds to inject, all you're literally doing is pulling the moulds out of storage and changing colours.