Journal Articles
How I'm Turning Pokémon Tournament Winnings Into an eBay Business
How I'm Turning Pokémon Tournament Winnings Into an eBay Business

How I’m using Pokémon tournament prize packs and store credit to build eBay inventory, track real sales, and learn the business side of a hobby I enjoy.

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How to Calculate Your Actual Profit Selling Pokémon Cards on eBay
How to Calculate Your Actual Profit Selling Pokémon Cards on eBay

A real $17.99 Psyduck sale shows what remains after eBay fees, postage, and packaging—and why sale proceeds are different from profit.

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Starting small: selling the cards I already own

My card-reselling experiment begins with cards I already own: learning the process, tracking the real costs, and making room for progress in a busy life.

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BNLCOLLECTORS CO.
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Practical resources for card sellers

Know Your Numbers.
Make Better Decisions.

Practical tools for tracking card sales, calculating profits, and managing a growing collectibles business.

Use the free calculatorExplore the Excel tracker
BNL COLLECTORS CO. / FREE TOOL

Card Flip Profit Calculator

Know your numbers before you buy. Estimate what you actually keep after selling fees, grading, shipping, and supplies.

01

What will the card sell for?

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Used for eBay's fee calculation, but excluded from your revenue because the marketplace generally remits it.
02

What did it cost you?

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03

Estimated marketplace fees

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Default for US non-Store trading cards; editable.
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Enter 0 if no general-strategy ad fee applies.
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Used to estimate the maximum price to pay.

Important: Illustrative estimates, not an eBay quote, accounting statement, or tax advice. Default fee is based on US non-Store sports and collectible trading-card categories. Rates, high-value tiers, store discounts, international fees, refunds, taxes on fees, and order-specific charges can differ. Check your actual fees in Seller Hub. eBay selling fees ↗ · Ad-fee details ↗

BNL COLLECTORS CO.

From a single sale to a clearer picture

Sports & TCG Reseller Profit Tracker

Connect inventory, acquisition costs, completed sales, marketplace fees, shipping, and business expenses in one Excel workbook. See realized profit alongside inventory value and cash movement.

Eight tabs include setup guidance, an inventory log, sales, expenses, a dashboard, monthly trends, editable fee assumptions, and worked examples.

Explore the workbook

Manual-entry Excel workbook. Microsoft Excel is required and is not included. The BNL listing is being prepared for launch.