Polar Bear Rug: $25,000

While elephant ivory and exotic birds comprised the bulk of online sales, about seven percent of listings featured other extremely rare species. The big cats were represented, with pelts from tigers, leopards, ocelots, and jaguars popping up on eBay and on other sites.

In perhaps the most ironic listing of all, a Chinese auction site listed a polar bear skin rug that sold for US $25,825. The seller noted that the pelt was "imported from Canada, and it's the last chance to have such a polar bear skin since the species is endangered due to the global warming."

Image: IFAW/R. Matamoros