"I knew I had to contact the seller and ask him if I could make a portrait, because this is such a very unusual item, even by Le Bon Coin standards," he says, still sounding a little excited.
But in one way the two presidents could well be opposite sides of the same coin, standard-bearers for competing strains in American politics.
He concluded that the Bible forbids any welfare programs, is opposed to all inflation, and requires a gold-coin standard for money.
If you should ask him to explain — in intelligible detail — why he preferred one of the coin-standards to the other, his attempt to do it would be disgraceful.
However, approximately half an official's salary in grain was made in payments of cash coins, the standard of which, after 119 BC, was the wushu coin measuring 3.2 g (0.11 oz).
Coin grading standards can change or loosen-up in order to introduce more coins to the market.
The largest standard coin in the US is a quarter - at the moment worth about 13 pence.
The best remedy would simply be to overhaul all our standard coin designs.
After the Han period (206 bc ad 220), the standard coin underwent many modifications.
Due to its milling and even its susceptibility to air currents, a standard coin might not actually produce a 50-50 result," he said.
For the next four centuries (until the absorption of Greece into the Roman Empire) the Athenian drachma had an almost constant silver content (67 grains of fine silver until Alexander, 65 grains thereafter) and became the standard coin of trade in Greece and in much of Asia and Europe as well.
