The price of kidney is indefinite. It usually cannot be sold in stock. This operation is performed when someone donates or sells (how much money is the seller's own matter) . There is no price for body parts , buying and selling them is completely illegal. It should be used as soon as someone donates. And if the doctor examines and says that only the kidney is needed , then if the kidney is transplanted then the patient will be able to lead a normal life. It is completely illegal in Bangladesh. Selling is forbidden in Islam. You do not own the kidneys or any of the organs! Allah Ta'ala is the owner of the organs of the body like kidneys , eyes etc. So , we don't have the right to donate or sell things that we don't own. If anyone donates and sells, he will be resurrected in the field of laughter without that donated organ. Therefore, in the eyes of Islam, it is not permissible to donate or sell organs while alive or after death. Remember one thing , a man survives by relying on his two kidneys. So refrain from selling kidneys.