I got my dogo from the same breeder you are talking about and didn't pay anywhere near 3000 for mine.
It was 1400 for the dog and approximately 1600 for the flight, shipping container and health certificate. How much did you pay?
Most recent my pops paid 600 for the pup & 800 for shipping.
That is reasonable. This dog was purchased as a "started" hog dog, so I paid more. It is also lot more expensive to ship an adult size dogo then a pup. The dog was a beautiful dog. He had great conformation, and probably would have been great in a show ring. He just wasn't any kind of dog I would hunt with. As I said earlier, I like fast-starting dogs with high prey drive. I wish any of the dogos would have worked out. I love the build of the dogo. They have speed and stamina. I was very disappointed with the way the turned out. Again, this was just my experience with four consecutive dogs from four different breeders. It is possible I just got four culls.