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The Expected Value

ChatGPT plugin

Card EV, prices and Manafolio

View in ChatGPT directory

Organize and research your trading-card collection. Create dated Daily EV briefings for boxes and displays, compare exact sealed products after your specified seller and payment fees, and summarize price history for an exact card printing or sealed product. Results identify observation dates, currencies, missing data and model exclusions. Five workflows guide briefings, comparisons, history research, authenticated sports card research and Manafolio reviews. Sports data requires sign-in and existing MCP Data Access entitlement. Secure account linking enables research according to existing account permissions. Separate consent allows access to your own Manafolio holdings and, when explicitly requested with write consent, reversible inventory changes and records of completed sales or openings. The plugin does not buy, sell or place orders. Observations are not live stock checks, guaranteed returns or financial advice. Never paste passwords or access keys into chat.

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Movement

From our daily snapshots over the last 30 days.

Rank by placement

#8908of 10,7043places down24h—7d
#8,202#8,395#8,588#8,781Oct 4Oct 10Oct 16Oct 22Oct 28Nov 2

Rank in Data & analytics

#511of 623024h—7d
#459#474#489#504Oct 4Oct 10Oct 16Oct 22Oct 28Nov 2

In its category

How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.

Data & analytics511th of 623 by placement
#PluginPosition7d
509Adzviser MNTN#88891,051places down
510ScaleSKUs#8894—
511The Expected ValueThis page#8908—
512Refix#8910—
513Lodestar Stamp#8914—

All 623 Data & analytics plugins

Example prompts

  • “Give me a Daily EV briefing for Magic boxes with dates and coverage.”
  • “Compare two exact boxes after my seller and payment fees.”
  • “Review my linked Manafolio holdings without making changes.”

Skills

  • daily-ev-briefing

    Create a dated trading-card Daily EV briefing for selected games or sets, showing box/display EV, observed sealed prices, coverage and model exclusions without account linking.

  • manafolio-review

    Review the linked user's Manafolio holdings, cost basis, dated valuations and concentration, or prepare a precise inventory change when the user explicitly requests one.

  • price-history-research

    Research how one exact trading-card printing or sealed product's observed price changed over a date range, with marketplace, finish, currency and missing-day coverage kept explicit.

  • sealed-product-comparison

    Compare exact trading-card boxes, displays or decks using fee-adjusted opened EV, break-even landed cost and dated marketplace low prices when the user is choosing between products.

  • sports-card-research

    Research exact sports card printings, dated Raw valuations and observed quote history using The Expected Value MCP connector.

Categories
Made by
DOMENIC CARL BENTZ · Website
Sign-in
On Install
Capabilities
Daily EV, Sealed comparisons, Price history summaries, Sports card research, Private portfolio, Reversible inventory updates
Availability
Available
Version
0.3.2
Keywords
trading cards, expected value, pricing, Manafolio
Created
October 1, 2026
More info
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