How much do transplant surgeons earn?

The answer varies widely. This depends on the area of the country, how hard the doctor wants to work and the contracts that he has with the insurance companies. Salaries.com gives the average for a cardiothoracic surgeon as about 420K, I suspect a transplant sureon in the right circumstance would make significantly more than this. Your question is like asking how much does a professional Baseball player earn. The answer is 'It depends'.