There are living transplant chains where people do meet each other and trade organs. These people are the ones receiving and the ones donating. There may be someone who needs a kidney in Colorado and has a match in California. The person in California may have an uncle who needs a liver and they use the "chain" to find someone.
This normally occurs more frequently in other countries and it is called "transplant tourism." However, this can involve money since it is not regulated in many other countries. In the United States, a living donor may donate a kidney or even a part of their liver, but can not make money off the organ.
