I Bought A Wheresgeorge.com Stamp.

I enjoy the site and have gotten bills found in a bunch of states. I make sure to use only one subtle and small stamp and not to stamp bills older than 1995, and of course I keep all the stars and nice S/Ns so that none of those get stamped. I collect paper a little bit but don't have much of a problem stamping a 2006 bill in the margins when it usually already has some writing and creases, but to each his own. It's not like all circulating bills are stamped, so even if you do find a valuable bill, odds are it won't be stamped, and I pity those who stamp such bills without knowing that they ruined something special.