It goes without saying that an Mk2 or Mk3 is practically worthless without the appropriate power supply (SH-10E). A power supply is hard to find separately. And if only the motor is offered in an auction you will never be sure to find a separate power supply unit (PSU) and you will not be able to play records with your SP 10. For an expert it would be possible to build a power supply as in the Service Manual all circuits and values of components are given.