Figures above suggest somewhere in the million dollar mark for a kilo of payload. There are ashes into diamond services, and ballpark figures would be 5 one carat diamonds to a gram or 2500 for half a kilo.
A million dollars split between 2500 is just $400 each.
Obviously very rough figures but it nothing screams outrageous to me. I'd be surprised if you couldn't fill 2500 of those orders.