In 1896, the Louvre shelled out 200,000 francs for an ancient gold tiara, believed to have belonged to Scythian king Saitapharnes. A German archaeologist, Adolf Furtwängler, however questioned its authenticity, as the artifact lacked aging. In 1903, a goldsmith from Odessa, Israel Rouchomovsky, admitted to having created the crown, commissioned by Russian dealers.
A golden crown (bpk/RMN-Grand Palais/Hervé Lewandowski)

About a million and a half dollars in today’s money if I do a lot of rounding and make a few assumptions which may or may not be based on accurate data.
I like to mess with future archeologists.
I buried a bedpan out in the woods with a metal tag with Queen Nancy Pelosis Crown stamped into it.
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It is the year 4022; all of the ancient country of Usa has been buried under many feet of detritus from a catastrophe that occurred back in 1985. Imagine, then, the excitement that Howard Carson, an amateur archeologist at best, experienced when in crossing the perimeter of an abandoned excavation site he felt the ground give way beneath him and found himself at the bottom of a shaft, which, judging from the DO NOT DISTURB sign hanging from an archaic doorknob, was clearly the entrance to a still-sealed burial chamber. Carson’s incredible discoveries, including the remains of two bodies, one of then on a ceremonial bed facing an altar that appeared to be a means of communicating with the Gods and the other lying in a porcelain sarcophagus in the Inner Chamber, permitted him to piece together the whole fabric of that extraordinary civilization.
Maybe, but Jack fell down and broke his bucket just doesn’t have the same feel.