For over 180 years, we’ve been collecting stamps, and philatelists have put a high price on the rarest of the rare ... (only 100 were ever printed), but the one sold in 2018 is the most ...

The stamp, seen here with Siegel Auctions President Scott Trepel, once famously featured in an episode of the Simpsons A rare US postage stamp ... sheet of 100. The one most recently sold is ...