Selling of puppies can be very difficult especially if you don't have buyers ready to pick them up once they are ready.
Whenever your dog gives birth to a lot of puppies, which sex do you usually sell off easily without stress?
I'm not really sure which one sells very well between male and female dogs but I believe that everything is going to be determined by the preferences of those that actually owns the dog. But personally I prefer female dogs to male dogs. I think it should sell better because they can breed.
It's all about what who wants to buy the puppies want. Someone who's looking at getting his or her dog to breed will most likely got for female puppies. But from my market analysis with how dogs are sold by my friend, he sells more male dogs than the female one's.
Female puppies always seem to sell out quickly in my place, I believe that reason why they are always being sought after more than the male puppies is because a lot of people like to breed their own dogs as well. This is why they love buying more female puppies than the male ones.