A black rhino in Namibia's Etosha National Park. Frans Lanting /DPA/Landov hide caption itoggle caption Frans Lanting /DPA/Landov The Two-Way Permit To Hunt And Kill One Black Rhino Sold For $350,000 January 13, 2014 Namibian officials issue five permits per year to hunt the endangered animal. For the first time, one was auctioned off outside that country. Proceeds will go toward conservation of the herd. But critics say it's not right to kill one animal in a bid to save others.