LOL! I bet it's cause if you don't know the people in the know then you'll be paying a pretty penny for a straight Dogo.
But on a serious note, that's probably what most people have is crosses. I know I haven't heard of too many people with full Dogos that are working stock. There are some, but not a lot. That's JMO though... I am no experienced Dogo guy by any means. I have a cross that I was very fortunate to get...