Per-piece data fields
Maker history blurbs (140 words each)
Drawn from castironcollector.com's maker timelines, the Wagner & Griswold Society's published reference works, and booniehicks.com historical write-ups. Cross-referenced against original Griswold and Wagner trade catalogs where available.
Identification marks per maker
The maker-mark guidance (Griswold large and small block logos, Wagner’s logo changes, Lodge’s notched heel, Favorite Piqua Ware marks, Vollrath stamps) is checked against collector references such as the Wagner & Griswold Society and the Griswold & Cast Iron Cookware Association. Logo-era dates are approximate; collectors still debate the edges of most of them, and the piece pages say so where it matters.
Per-piece blurbs (130–180 words each)
The “what to check before bidding” text on each piece page is written for this site, drawing on:
- Cross-referenced collector forum discussion (r/castiron, the Cast Iron Cookware Association forum, the Wagner & Griswold Society discussion archives) for common defects and pricing sanity checks
- castironcollector.com pattern-specific commentary where applicable
Typical price ranges
The [low, high] price bands shown on each piece page are working-condition mid-band estimates — what a clean, flat- bottomed, mark-visible piece trades for on eBay in 2026. Where a piece has a market snapshot, the page uses the snapshot’s typical asking range instead. Sources: recent sold-listings data on eBay (filtered to completed transactions for that maker + pattern + size), griswoldcookware.com auction-result aggregations, and the Wagner & Griswold Society's published guidance. Rare-pattern outliers (an Erie pre-1909 spider skillet at $2,000+, for example) are intentionally conservative — the band shows you what a typical working example costs, not what a museum-grade rarity would.
Common-defects callouts
Drawn from collector-forum failure-mode discussions and restoration guides. Where a defect is piece-specific (cracked spider for a Tite-Top, missing original waffle-iron stand, etc.), we name the specific failure mode rather than generic "may have damage" copy.
eBay search terms + category IDs
Hand-curated per piece. The category ID 904 (Pottery & Glass > Cookware) is the primary eBay leaf for vintage cast iron cookware. Some pieces use the alternate Kitchen category 20625 when that's where the most-active sellers list. The search terms include both the canonical maker + pattern phrasing ("Griswold 8 small logo skillet 704") and known seller-variant synonyms.
How listings get onto a piece page
Listings on a piece page come from a dated market snapshot (see below): we review the active eBay listings for that piece, record each one’s price, shipping, format, seller feedback and condition, and pick the ones worth buying. Snapshots are re-checked roughly monthly. Between checks some listings will have sold or ended, so every snapshot shows its capture date and links to the live eBay search for that piece. Every eBay link is a plain link to eBay, with no affiliate or tracking code.
Piece photos
The product photo on a piece's page and cards is a representative image, not a photo of any one skillet, dutch oven, or griddle for sale. We generate it with an AI image model, working from several real seller photos of that piece, and compare it with those photos before publishing. It is shot on a plain studio backdrop so every piece looks consistent.
That means it shows what the piece looks like, not the condition of a particular one. Logo style, pattern and heat-ring details, seasoning, pitting, and wear vary from pan to pan and between production years, and small details like the underside stamp may be simplified. Always judge a piece by the seller's own photos, especially the underside and the cooking surface. Wherever a representative photo appears large, it carries the caption “Representative photo — AI-generated from real seller photos. Individual listings vary.” Pieces without one show no photo.
Market snapshots and buying picks
For pieces with a buying guide, we capture a snapshot of the matching eBay listings on a given date. We record the count, the price range, where most asking prices cluster, and a selection of listings with their price, shipping, format, seller feedback, and condition. The date is shown next to the listings (“Snapshot captured …”), and by the time you read it some of them will have sold or ended. The “See all current listings on eBay” link always opens the live search. When a snapshot exists, its typical asking range replaces the catalog's static used-price band on that page.
Delivered prices are the asking price plus shipping as eBay quoted it to a US address on the capture date. Free shipping is the same for every US buyer, so those totals are labelled “delivered”. Paid shipping is often calculated by distance, so those totals are labelled “est. delivered”: yours may be higher or lower, and eBay shows your exact total before you buy.
Each listing shows the seller's positive-feedback percentage and, where we captured it, their rating count: the eBay feedback score shown next to the seller on the capture date. It counts rated transactions across everything they sell, not just cast iron.
The captured listings are then tagged with plain labels: Cheapest (lowest delivered price for a complete, usable piece), Best value (evidence it is flat and crack-free at a below-typical price), Best for beginners and Easiest to get working (already cleaned or seasoned, ready to cook on), Collector's pick (a desirable logo, pattern, or production window at a sane price), and Project piece (a cheap rusty or crusted piece worth restoring). Two warning tags flag listings to approach with care: Check the seller (little or no feedback) and Priced high (well above the typical range without a clear reason). These are judgement calls made from the listing text and photos. We have not handled the pieces, and nobody pays for placement.
What we deliberately don't do
Historical price-trend charts
A real time-series price chart per piece would require months of ingest history before becoming meaningful. We show typicalPriceRange (a hand-seeded static band per piece, updated periodically) plus current live listings — not a chart of historical sale prices. A trend chart is a deliberate follow-up if the project shows traction.
Condition grading our own pieces
We don't grade the condition of any specific listing. The condition badge on each listing card ("Used", "Restored", "Cracked") is mapped from eBay's own seller-declared condition code, not from our independent inspection. Sellers occasionally mis-grade; the buying-guide content tells you what to verify regardless of what the listing claims.
Auction-only history archives
We don't archive completed-listing prices long-term. griswoldcookware.com has done that for years and we don't add value by duplicating it. The typical-price-range field on each piece page is our condensed read of their (and others') historical data.
Reproduction detection or authentication services
We give you the three-check authentication framework in the identify-real-Griswold-vs-reproduction guide, but we don't authenticate specific pieces for hire. For high-value purchases ($500+), defer to the Wagner & Griswold Society or a recognized collector dealer for verification.
Data confidence flags
Pieces in this catalog carry a notes field with per-piece caveats — "spec inferred from Wagner & Griswold Society reference," "reproductions exist; verify before paying premium," etc. Read those notes; they're part of the data, not editorial filler. Where we're confident the data is verified first-hand, the notes will say so. Where we're inferring from published references, the notes name the reference.
Contact
Data correction? Pattern attribution we got wrong? Missing piece reference you'd like to see catalogued? File an issue on the Clawset GitHub repo. Substantive corrections get applied to the next deploy.