This is a first for me. Mostly they want to give you something rather than purchase something from you.

The email is copied below.
My name is Dr watson kyle of UBTH Specialist Hospital, i am a specialist in organ Surgery, and we deal with the buying if organ from human who want to sell, and we are located in Nigeria, USA and in Malaysia, but our head office is in Nigeria. if you are Interested in Selling your Kidney Please do not hesitate to Get back to us so we can That Proceed further. And this is our Email if you are interested