Linc places the winning bid (backed with his six-shooter) of $750 to buy Kim her freedom, then casually tosses a pouch containing that much in gold on the auction block without bothering to count it first. In 1870 a $1 gold coin weighed approximately 1.70 grams when the going price of gold was about $19 an ounce. In 2025 terms, Linc would have been carrying $135,000 in gold, a princely sum for a trail boss to have in his possession.
Nobu McCarthy's knee-length white dress might have looked stylish in 1960 when the film was made, but would have been totally inappropriate and unacceptable in the 1870's time frame in which the film is taking place.