You’d think the U.S. Postal Service would have plenty of money, but apparently they’ve seen the value (and cash!) that good marketing can produce. Case in point is a release we got today whereby the USPS notes that the best-selling stamp of all time features the King himself, Elvis Presley. He leads the Top 25 list of the most popular commemorative stamps ever, with 124.1 million sold to date. The top five best-sellers list is rounded out by Wonders of America (87.5 million), Wildflowers (76.1 million), Rock & Roll/Rhythm and Blues (75.9 million), and (Geek Alert!) DC Comics Super Heroes (73 million). In case you were wondering, the USPS takes in $72 billion annually. We think we’re in the wrong business.