Despite the law in the US that states that humans cannot sell their organs to other humans (they can only be donated), organ transplantation is far from being free. This article has some interesting numbers on the cost of organ transplantation in the US.
Japanese who traveled to the United States
to get new hearts were charged as much as about $1.63 million for the
operation in 2008, or five times higher than in previous years, medical
sources well-versed in organ transplants
said Thursday.
...In the U.S., the only country that accepts Japanese for heart transplants, nationals are charged $300,000 on average in hospital and physician fees for the operation, they said, adding that the figure does not include pre- and posttreatment fees.

...In the U.S., the only country that accepts Japanese for heart transplants, nationals are charged $300,000 on average in hospital and physician fees for the operation, they said, adding that the figure does not include pre- and posttreatment fees.
HT to Al Roth