According to a recent quarterly analysis from Koei-Tecmo Global (Japan), Dead or Alive Dimensions has only managed to sell 310,000 copies in its lifetime. That's global numbers which include North America, Europe, Japan, and Asia.
The low number could be attributed to the weak sales of the Nintendo 3DS platform. A platform which has had trouble marketing itself to consumers.
Dead or Alive Dimensions released at the end of May. So the question remains, are you one of the 310,000 owners of the portable Dead or Alive? Do you still play your copy? or have you given up on your game and/or the Nintendo 3DS?