The kidney is the most sought-after organ in transplant tourism, with prices for the organ ranging from as little as $1300[37] to as much as $150,000.[63] In fact, reports estimate that 75% of all illegal organ trading involves kidneys.[76] The liver trade is also prominent in transplant tourism, with prices ranging from $4000[77] to $157,000.[78] Though livers are regenerative, making liver donations non-fatal, they are much less common due to an excruciating post-operative recovery period that deters donors. Other high-priced bodily organs commonly sold in the organ trade include corneas ($24,400) and unfertilized eggs ($12,400), while lower-priced bodily commodities include blood ($25–$337), skin ($10 per square inch), and bones/ligaments ($5,465).[78] While there is a high demand, and correspondingly a very high price, for vital organs such as hearts and lungs, transplant tourism and organ trafficking of these parts is very rare due to the sophisticated nature of the transplant surgery and the state-of-the-art facilities required for such transplants.[78]