France
Napoleon III gold 100 Francs 1867-BB AU58 NGC, Strasbourg mint, KM802.2. Mintage: 2,807. Essentially fully detailed with scattered ticks on both sides and a set of slide abrasions on the reverse that blend into the lower portion of the coat of arms. Given its low mintage, it's not surprising that this date remains rather scarce in any condition.
Estimate: 2000-2500 USD