The amazing example in our main picture (to the left) sold for $1400 US dollars during a 2014 auction by Goldberg Coins in Beverly Hills, USA. The Goldberg coin is in wonderful condition and center struck. CoinQuest thanks the Goldbergs for use of their coin photo.
The coin was issued under the moneyer Lucius Plautius Plancus to commemorate Julius Caesar's military victories of 48 and 47 BC. The obverse shows Medusa with dishevelled hair and flanked by coiled serpents. The reverse has Aurora (or Victory), draped and winged, flying right holding reins of four rearing horses of the sun. The legend LPLAVTIVS is 'Lucius Plautius.'
Approximate catalog values run like this:
worn: $100 US dollars approximate catalog value
average circulated: $480
well preserved: $900
Consider the three coins to the right. The (A) coin is significantly worn, the (B) coin, which comes from our requester Jed, has better detail than the (A) coin, but much less detail than the (C) coin. Here are the prices:
(A) coin: $100 in a 2013 auction
(C) coin: $1200 in a 2015 auction
All in all, we would say Jed's (B) coin should sell for $300 to $400 retail.