I think the most expensive individual anime series I've bought was probably either the Love Live Season 1 NIS premium edition or Funi's Kamisama Kiss Goddess Edition. AL have yet to release an Ultimate Edition of something I've liked enough to want one. I just can't bring myself to pay AoA or PonyCan prices. In terms of franchises, I've probably spent the most on Love Live. @Lord Bacchus - Companies can also print the standard edition Bluray discs at the same time they print the premium edition ones if the discs are identical, therefore saving money per disc by buying a larger print run.