Master Source Index — Collectibles Data
Every grader, auction house, marketplace, and registry we cite. Bookmark this.
Collectibles Multiverse only cites public sources from professional graders, auction-house archives, official manufacturer registries, and major marketplaces. This master index lists every primary source used across the site.
Professional Graders
- PSA Population Report — Professional Sports Authenticator — psacard.com/pop
- PSA Card Lookup — psacard.com/cert
- Beckett Grading Services — beckett.com/grading
- SGC (Sportscard Guaranty) — gosgc.com
- CGC Cards — cgccards.com
- CGC Comics — cgccomics.com
- CBCS Comics — cbcscomics.com
- WATA (video games) — watagames.com
- VGA (Video Game Authority) — vgagrading.com
- PCGS (coins) — pcgs.com
- NGC Coin — ngccoin.com
Major Auction Houses
- Heritage Auctions Archives — Free realized-price database — ha.com
- Goldin Auctions — goldin.co
- PWCC Marketplace — pwccmarketplace.com
- Christie’s — christies.com
- Sotheby’s — sothebys.com
- Bonhams — bonhams.com
- ComicConnect — comicconnect.com
- ComicLink — comiclink.com
Marketplaces & Price Guides
- TCGplayer Market Price — tcgplayer.com
- eBay Sold Listings — Live transaction record — ebay.com
- 130point — Aggregator for sports cards — 130point.com
- Card Ladder — cardladder.com
- Cardmarket (Europe) — cardmarket.com
- Overstreet Price Guide (comics) — gemstonepub.com
- Price Charting (video games) — pricecharting.com
Manufacturer & Publisher Sources
- Pokémon TCG Official — pokemon.com/tcg
- Magic: The Gathering Gatherer — gatherer.wizards.com
- Scryfall (MTG database) — scryfall.com
- Yu-Gi-Oh! Card Database — db.yugioh-card.com
- Topps — topps.com
- Panini America — paniniamerica.net
- Upper Deck — upperdeck.com
Reference Databases
- Grand Comics Database — comics.org
- Comichron (sales data) — comichron.com
- Discogs (records) — discogs.com
- BoardGameGeek — boardgamegeek.com
Editorial standard: Every price, population count, and provenance claim on Collectibles Multiverse cites a named entry on this index. How to verify: market prices change daily — always check the source link for the current realized price before buying or selling.
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How we researched this
This piece on Master Source Index — Every Collectibles Authority We Cite draws on published auction house results, professional grading service population reports, dealer price lists, hobby trade publications, and historical sale records current to May 2026. Where price ranges are provided, they represent observed realized sales across multiple independent venues rather than a single asking price or speculative valuation.
Our editorial process involves cross-referencing realized auction prices against grading service population data and dealer price guides before publication. The collectibles market is illiquid, condition-sensitive, and subject to taste shifts; figures change continuously and should always be confirmed with current auction comparables before any transaction.
Key takeaways for collectors and sellers
- Condition drives value in nearly every category. A one-grade difference can mean a 5x to 50x price difference at the high end.
- Realized prices from completed auctions are the only reliable price signal. Asking prices on listing sites reflect optimistic seller expectations; sold prices reflect what buyers actually paid in a competitive setting.
- Authentication is essential for any high-value piece. Provenance documentation, original packaging, period-correct materials, and consistent wear patterns all support authenticity claims.
- Buyer premiums and seller fees can add 15 to 30 percent to the headline price at major auction houses. Always calculate net proceeds on the seller side and total spend on the buyer side before bidding or consigning.
- Tax treatment of collectible gains differs from ordinary capital gains in many jurisdictions. Long-term collectible gains may be taxed at higher rates. Consult a qualified tax advisor before disposing of significant holdings.
Frequently asked questions
How current is the information on this page?
This page was last reviewed in May 2026. Realized prices fluctuate continuously; we recommend pulling the most recent auction comparables from at least two major venues before making any transaction decision.
Where does the underlying data come from?
Underlying data is sourced from published auction archives, professional grading service population reports, hobby trade publications, and dealer-published price lists. We do not republish proprietary subscription-only price guides.
Should I treat collectibles as an investment?
Collectibles are illiquid, condition-sensitive, and subject to taste cycles. Storage, insurance, authentication, and transaction costs are material. We do not provide investment advice; consult a qualified financial professional before allocating meaningful capital to any collectible category.
Related coverage on CollectiblesMultiverse
- Oceania Collecting Guide (Australia & New Zealand)
- I Spent $200 Per Week at Estate Sales for a Year. Here’s the ROI
- North America Collecting Guide (US & Canada)
- PSA vs SGC 2026: A Side-by-Side Buyer's Guide
- Why Provenance Matters More Than Condition (Sometimes)
- PSA Grading Standards Reference: Public Official Documentation
CollectiblesMultiverse maintains editorial independence from auction houses, dealers, and grading services. If you spot an inaccuracy, please use the contact link in the footer to report it.