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AgentProductivity & Personal Assistance

Inherited Collection Guide

Free agent kit that helps families who inherit a card collection protect it, sort it, check values from sold prices and choose how to sell, keep or share it.

Updated Oct 30, 2026Marketplace Founder

About Inherited Collection Guide

Inheriting a card collection usually means boxes you don't understand, a deadline to clear a house, and sometimes a quick "I'll take it all" offer. Most of the value is often in a few items. But it's hard to know which ones, and easy to sell too fast or too cheaply.

This agent kit is a patient guide for people who aren't collectors. It explains how to protect the collection straight away: don't open sealed boxes, don't clean cards, store everything safely. It shows what to set aside first: graded slabs, sealed product, autographs, older cards, stars and rookies, early Pokémon holos and first editions. It gives a sorting plan and an inventory table, and explains how to find values from real sold prices rather than old price guides. It compares the ways to sell, keep or share a collection, warns about lowball and pressure tactics, and says when to bring in an appraiser, an authenticator, a tax professional or the estate's lawyer. You end with a step-by-step plan at your own pace.

Inside: the agent instructions, a triage guide, a selling-options guide with general estate and tax notes, a sorting plan and inventory template, conversation starters, a Claude Code subagent and a worked example.

Limitations: it can't see or value your items and never quotes values from memory. It's general guidance, not an appraisal, legal or tax advice, and the tax notes are US-focused.

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What's inside (10 files)
  • inherited-collection-agent/CHANGELOG.md
  • inherited-collection-agent/claude-code/agents/inherited-collection-agent.md
  • inherited-collection-agent/examples/example-1.md
  • inherited-collection-agent/instructions.md
  • inherited-collection-agent/knowledge/inventory-template.md
  • inherited-collection-agent/knowledge/selling-options.md
  • inherited-collection-agent/knowledge/triage-guide.md
  • inherited-collection-agent/LICENSE.txt
  • inherited-collection-agent/README.md
  • inherited-collection-agent/starters.md
Read the README inherited-collection-agent/README.md
# Inherited Collection Guide

A free agent kit for people who have inherited or need to clear out a collection of sports cards, Pokémon and other trading cards, or signed memorabilia, and don't know where to start. It helps you:
- protect what may be valuable;
- sort and list the collection;
- find values from real sold prices;
- weigh the ways to sell, keep or share it;
- know when to bring in an appraiser, an authenticator, a tax professional or the estate's lawyer.

It's patient and plain-spoken, and it never rushes you.

Made by AgentLoomX (https://agentloomx.com). Version 1.0.0.

## Who it's for

- Family members and executors handling a loved one's collection.
- People clearing a house who find boxes of cards.
- Anyone who has had a quick "I'll take it all" offer and wants to know whether it's fair.

## What's inside

```
inherited-collection-agent/
  instructions.md                      the agent's instructions (system prompt)
  knowledge/triage-guide.md            handling, what to set aside first, eras and what usually matters
  knowledge/selling-options.md         finding values from sold prices, ways to sell, lowball signs, appraisals, estate and tax notes
  knowledge/inventory-template.md      the sorting plan and an inventory table to copy
  starters.md                          conversation starters
  claude-code/agents/inherited-collection-agent.md   Claude Code subagent version
  examples/example-1.md                a worked example: 12 shoeboxes, Pokémon binders, slabs, and a $500 offer
  README.md, CHANGELOG.md, LICENSE.txt
```

## Setup

### ChatGPT (GPT Builder)
1. In ChatGPT, go to Explore GPTs, then Create.
2. Open the Configure tab. Name it "Inherited Collection Guide".
3. Paste the full text of `instructions.md` into Instructions.
4. Under Knowledge, upload the three files in `knowledge/`.
5. Add the conversation starters from `starters.md`, then save.

### Claude (Projects)
1. Create a new Project.
2. Paste `instructions.md` into the project instructions.
3. Add the three files in `knowledge/` to the project knowledge.

### Google Gemini (Gems)
1. Create a new Gem.
2. Paste `instructions.md` into the instructions box.
3. Add the three files in `knowledge/` as knowledge files.

### Claude Code
1. Copy `claude-code/agents/inherited-collection-agent.md` to `~/.claude/agents/` (all projects) or `<project>/.claude/agents/` (one project).
2. Optional: copy the `knowledge/` folder into your project. The subagent looks for `**/inherited-collection-agent/knowledge/*.md`.
3. Ask: "Use the inherited-collection-agent subagent to help me plan what to do with the collection described in notes.md."

## Usage examples

- "My dad left about 12 shoeboxes of baseball cards and some Pokémon binders. Where do I start?"
- "A shop offered $500 for everything. Is that fair?"
- "How do I look up these PSA cards?"
- "My sister and I want to split the collection. How do we do it fairly?"

See `examples/example-1.md` for a full run.

## Limitations

- **No values.** It can't see or value your items, and it never gives values for specific cards from memory. Values come from the sold prices you look up, or from a professional.
- **Not advice.** It's general guidance, not an appraisal, legal, tax or financial advice. Estate and tax rules depend on your country and situation; the tax notes are US-focused and general.
- **No recommendations of businesses.** It doesn't recommend specific dealers, consignors or auction houses.

## Support

Questions or problems? Use "Ask a question" on this product's AgentLoomX listing page.

## License

AgentLoomX Standard License. See `LICENSE.txt`.

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Signed with Ed25519 key a9c62a7921065aa9. Public keys

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Highlights

  • Protect-it-now steps for cards and sealed boxes
  • What to set aside first, and why
  • Sorting plan and inventory template
  • Values from sold prices, not price guides
  • Selling options with honest trade-offs
  • When to bring in an appraiser or tax pro
  • sports cards
  • pokemon cards
  • inherited collection
  • estate
  • collectibles
  • card collection