I am in Oklahoma, and a C-Section is around $200 here also. Emergency C-Section $300-$500 depending on vet. Spay is $60, neuter is $50. Ultrasound around $100, and X-rays $40-50.
This is not just one cheap vet, this is the average among many vets in the surrounding area. Just because a service is cheaper in a certain area, doesn't mean the provider is less able. Prices, on the east and west coast particularly, are much higher in some areas, as is the cost of living. For example, we have a lot of people moving to our area from California. They can sell their house in CA for half a million dollars, and buy a comparable house here for $150,000. (or less) Same house, different price.