I searched around but couldn't find a thread on barter, but I remember there was one once. Zero Hedge did it again:
http://www.zerohedge.com/news/2012-10-04/guest-post-one-very-strange-use-silver-coins
http://www.zerohedge.com/news/2012-10-04/guest-post-one-very-strange-use-silver-coins