The pangolin, pictured above, is said to be the most trafficked mammal. "According to estimates from UK researchers and Chinese wildlife enforcement officials, about 10,000 pangolins are smuggled into China from Southeast Asia each year. Prices for pangolins have also increased astronomically: In the 1990s, they were worth about $14 per kilogram. Today it's $600. (Dec 30, 2016)"
The increase in price is probably due to the trafficking being made illegal, making it harder to smuggle them. They are still used widely in traditional Chinese medicine which has not even been proven to work