Ordinary follis / nummus
Diocletian · Observed / Range
Source location: Book 2, Chapter 1, Pricing Schedule, PDF p. 6
Certified / slabbed evidence
Certified Grade Evidence NGC MS 5/5, 3/5 Heraclea follis · ~$233 buyer-inclusive; NGC Choice AU 5/5, 5/5 Aquileia follis · ~$368 buyer-inclusive
Current fixed-price retail
Fixed-Price Retail Follis ~$180–350+
Raw auction
Buyer-inclusive ordinary reform follis median ~$234; n=8; 20th–80th percentile band ~$180–$240 (Book II, Chapter 1, Auction vs. Fixed-Price Retail, PDF p. 8).
Published schedule observations (not raw-auction tiers)
Entry: ~$180; Typical: ~$180-$240; Choice: ~$240-$350+
Market / specialist note
Raw n=8; rare London, abdication and exceptional silvering separate.
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.