I would be safe to say that Thailand is the sex change capitol of the world. Not Trinidad.
About the prices, they are not much more expensive compared to other surgeons around the world.
For example, My surgeon in the US charges 20,000 US Dollars. Dr. Suporn charges about 15,000 US Dollars (compared) in Thailand. If you factor in the plane ticket, visa, the 2 weeks stay at the hotel you are spending the same amount of money.
Dr. Kunaporn in Thailand charges 11,000 dollars and when you factor in all the other costs it comes to about 16,500.
A friend of mine spent 24,000 US Dollars for Dr. Brassard.
So not all US Doctors charges much more than other countires and its not a corporate greed issue. It's more like them covering their as*es if a trans sues them for malpractice, surgery costs, anesthesia costs, aftercare etc. The price is about the same for many other surgeries if you were to pay out of pocket.