The Lithuanian Basketball coins were extremely popular. Gold won COTY and any of my regular commemorative ones were quickly snapped up in swaps. http://lunaticg.blogspot.ca/2012/07/coin-constellation-winners-2012.html
Somalia already beat them to the punch... http://news.motorbiker.org/blogs.nsf/dx/money-pay-in-motorcycle-coins---only-in-somalia.htm