About the Masthead
About SpanishGoldCoins
Mark Sullivan
Founder & Editor-in-Chief
A decade following Heritage, Stack's Bowers, and Sedwick auction results has given Mark a ground-level view of how provenance, certification, and market timing move prices across every grade tier.
The question that kept coming up — in collector forums, in dealer price lists, in auction house footnotes — was whether a given Spanish colonial coin was priced against its actual rarity or against a buyer's ignorance of the market. That asymmetry bothered me. The same 8-escudo cob type, same date, same mint, could carry a $400 price tag at a coin show and a $4,000 hammer price at a major auction two weeks later, and almost nothing in the publicly available literature explained the gap in plain language. I built this site to close that information gap — not for any single tier of the market, but for all of it, from the collector who just found a circulated half-escudo in an estate lot to the investor assembling a certified shipwreck collection worth more than a house.
What I bring to this site is a structured reading practice applied to a category most generalist finance and collectibles media treats as a curiosity. Over the years I've worked through thousands of Heritage, Stack's Bowers, and Sedwick auction archives, tracked PCGS and NGC population reports as they shift, and followed the specialist literature — from the American Numismatic Society's publications to the detailed die-study monographs that serious researchers produce. I don't pretend to be an archaeologist or a metallurgist. What I do is synthesize what the experts, the graders, the auction specialists, and the long-term owners report, then translate it into language that helps a reader make a better decision.
The way this site works is straightforward: every guide, valuation article, and buyer's primer is built from published auction results, certified population data, dealer catalog descriptions, and the aggregated experience of collectors who have documented their purchases and sales publicly. When owners consistently report that a particular mint's cobs are prone to misidentification, that finding appears here with sourcing. When PCGS and NGC population data shows a date is genuinely scarce in Mint State versus merely undergraded in the market, that math gets laid out explicitly. Affiliate links to APMEX, eBay, Heritage, and grading-service submission pages are present throughout — they are how the site earns revenue — and they are disclosed clearly on every page.
What this site refuses to do is flatten the market into a single buyer archetype or pretend that every Spanish gold coin question has a commodity answer. We will not tell a reader that a certified NGC AU-55 Lima 8 escudo from the 1715 Fleet is "basically the same" as a raw circulated piece of the same type — because the certified piece may be worth fifteen times more and the reasons why matter enormously to anyone spending real money. We also refuse to let the entry tier disappear from the conversation: a $200 circulated 1-escudo cob is a legitimate and historically meaningful object, and a new collector deserves the same analytical honesty as a bidder at a six-figure auction lot. The premium segment is first-class here because the margins and the stakes are highest there — but no tier gets condescended to.
This site is written for the collector who wants to understand what they're buying before they buy it, the inheritor who just discovered a Spanish colonial coin in a family estate and needs to know whether it's worth $80 or $8,000, the alternative-asset investor who has heard that certified shipwreck gold holds value and wants the unvarnished market picture, and the experienced numismatist who needs a reliable secondary reference to check a valuation or a population figure. If you read carefully and follow the sourcing, you will leave better equipped than when you arrived — that is the only metric that matters here.