(Example of format: “…I’ll see your Ancient Pyramids, and I’ll raise you the Trojan Horse.” Multiple bids were common.)

The Golden Fleece
Medusa’s head
A unicorn’s horn
A griffin’s toe
The Leaning Tower of Pisa [ten of these were bid]
The Sistine Chapel
The Great Wall of China
Lucy [Australopithecus Afarensis]
The flux capacitor from the DeLorean in Back to the Future
Harry Potter’s broomstick
Igon’s proton-pack from Ghostbusters
Batman’s utility belt
Wolverine’s skeleton
Nightcrawler’s ability to teleport