You may think of the U.S. Postal Service as a dusty and outmoded institution, and we wouldn't argue with you, but it seems the good ol’ USPS is still doing something right. Just check out its latest batch of cool Forever Stamps featuring classic Muscle Cars...
Are you a big Simpsons fan? You’re in luck! Stamps featuring characters from the popular show were issued back in 2009 and 2010, but the USPS still has a few left. And by “a few,” we mean 682 million.