A friend and I were discussing these a few days back, and I figured it definitely deserved a mention here.
These were available in Japan during May of 2006 for a limited period of time. They were quite a bargain as well, in fact, a sheet of ten 80 yen stamps sold for 3,150 yen or roughly $26 US. Not only are they awesome collectibles, but they`re valid usable stamps too (Not that we would dare). What better way to send a letter to Nintendo power?
Check the link, they look much better in real photos instead of the generic stock photo below.
When looking for the stamps on eBay, I found these bad boys.
Absolutely a steal for $25.