Bakers of A2K: get 1847 sourdough starter for the price of a stamp.

I decided I would like to make some sourdough bread so of course I need a starter. While investigating how to make starter I came across this: http://carlsfriends.net/source.html.

If you send them a self addressed, stamped envelope they'll send you some sourdough starter from 1847.

Such a deal!