thanks to the OP for posting this...i have also wondered why breeders charged more for the "smaller" puppies and until i realized the care that goes into making sure the littlest ones survive, i thought it was a supply & demand issue ... but ITA with the poster who said unethical breeders do not put the extra care into the smaller ones and for them it is just $$ signs in their eyes
so i guess what i am saying is i can see both sides!
although i do not think i have personally EVER seen a website where the breeder charged the same price for all sizes of puppies - smallest to largest (taking gender out of the equation)