These stamps have been around for a while, I think since the eighties. I have never bought any. The idea is ridiculous, that drug dealers will come in to buy stamps for their product to ensure that they comply with the tax laws. These stamps are made solely for collectors. You can find issues from several states on
ebay. For example, here is a Nebraska marijuana tax stamp on
http://cgi.ebay.com/NEBRASKA-MARIJU...MP_W0QQitemZ320212618419QQihZ011QQcategoryZ690QQssPageNameZWDVWQQrdZ1QQcmdZViewItem