They may be cheaper but that is because they're no longer as rare as the dwarf burm still is, plus they do still get considerably larger. in dwarf retics you're still looking at 10-12ft in length where as a dwarf burm you'd see a max of 7ft. much like the SUPER dwarf retic which is again higher in price right now and, for the most part, stays within the lengths of a Ball or barely larger.