1989 Fleer Billy Ripken F%%% Face Error #616A

This eBay item is the infamous Bill Ripken 1989 Fleer baseball card with the "error." The story behind this was that as a practical joke, the words "F*** Face" were written at the bottom of several team baseball bats, and supposedly nobody caught on the "error" until it was printed.

Several revisions had black bars and white out marks covering up the offending words, and now it's a sought after collector's item.

History repeats itself again with the release of All Star Batman and Robin #10, which features a significant amount of adult language, but is blacked out. Unfortunately, the ink used for the lettering was darker than the ink for the black out, rendering the offending text completely legible. The error was caught, and retailers were asked to return the offending copies. Of course, they're now on eBay.