We are thinking about getting a puppy. Have been doing a bit of research. We are looking at a Staffie - terrible rep I know, but we want a medium sized dog that will be a good family pet. I have seen a couple of ads where the females are less money. Can I ask why this is a no-no please? There is a massive price difference - £900 at most, £175 the least. We aren't too bothered about breeding, just want to ensure it has had this eye test done.