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Theory Cards launches to rank and explain the collectible card market

15 September 2026 Consumer Domain Farm Ltd

Guides to the most valuable Pokemon, sports, Magic and trading card game cards, with grading explained and market movements tracked.

The Theory Cards homepage
Screenshot of www.theorycards.org.uk, 15 September 2026.

Domain Farm Ltd has launched Theory Cards, a title covering the collectible trading card market.

The site publishes ranked guides to the most valuable cards across Pokemon, sports, Magic: The Gathering and other trading card games, alongside explanations of grading and reporting on where the market is moving.

The collectibles market runs on two things that are rarely explained together: which cards are scarce, and what condition grading does to their value. A card's grade can change its price by an order of magnitude, and the grading scales are not intuitive. Theory Cards sets out both, so that a ranking can be understood rather than simply read.

Prices in this market move, and the site records when a figure was accurate rather than presenting it as permanent.

Theory Cards publishes at theorycards.org.uk and is free to read.

About Domain Farm

Domain Farm Ltd builds and operates independent news and reference titles in the United Kingdom and internationally, each covering a defined subject rather than general news.

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Notes to editors

Organisation
Domain Farm Ltd
Contact
Sam Allcock
Email
info@domainfarm.co.uk
Website
https://www.domainfarm.co.uk

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