Construction on the Brooklyn Bridge began in 1870, the same year Parker was born. When the bridge was completed in 1883, it was immediately heralded as a symbol of progress and optimism. Shortly thereafter, Parker started selling the bridge. Yes, the whole bridge.
It seems ludicrous now, but back in the day, people apparently went about swapping infrastructure willy-nilly, because the scam totally worked. A lot. Parker would find a mark -- often a recent immigrant -- and convince said mark that A) they could make a ton of money by charging tolls to anyone crossing the bridge, B) George Parker owned the bridge, C) Parker was willing to sell the bridge for a very reasonable price, and D) he wasn't laughing at them -- he'd just thought of something funny that was totally unrelated to buying a whole bridge from a dude on the street.
Daniel Berry Austin
"Welcome to America! Where anything is possible!"
Parker was a master salesman who went the extra mile, producing authentic-looking paperwork to verify his claims. He was also persistent -- he allegedly sold the Brooklyn Bridge an average of twice a week for years. Over and over, New York police had to forcibly stop Parker's swindle victims from constructing toll booths, traffic barriers, and Road Warrior-style flamethrower outposts on the bridge that they believed they owned.