Posthumous Neptune as
Issued under Caligula.
Reference: RIC 58
Marcus Agrippa · Observed / Range
Source location: Book IV Chapter 2 Pricing Schedule
Certified / slabbed evidence
VF sold for ~$317; XF ~$439; AU ~$1,952
Current fixed-price retail
Active ordinary asks roughly ~$159-$204; budget examples can be lower
Raw auction
CNG buyer-inclusive sample median ~$300; middle 50% ~$270-$660
Market / specialist note
Caligula posthumous issue retained.
What affects this price?
Even within one ruler, denomination and type, grade, strike, centering, surfaces, style, patina, rarity, provenance, and tooling or smoothing can materially change value. These are not automatic numeric adjustments.