If I was to guess, it is due to the fact that these are out of print boxes and thus it is difficult to get large quantities of boxes at below market prices. Yes, you can find a box here and a box there for a few dollars less but Massdrop is offering large quantities to their customer base from trusted vendors and at reasonable prices. Maybe not the absolute lowest price that can be found anywhere for a few boxes but probably the lowest that can be found in mass....