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Getting Started
- What is Mint Margin?
- Mint Margin is a free tool that helps vendors calculate fair trades in person and TCG shows.
- Who is it for?
- Anyone trading cards — whether you’re a collector, vendor, or casual fan.
- How to access the app:
- Platforms: Works on mobile & desktop (browser-based PWA)
Trade Calculator Overview
The Trade Calculator helps you quickly evaluate trades, purchases, or sales between a vendor and a collector. It’s made up of three simple parts:
1. Percentage Setter
This is where you define the terms of the trade.
Adjust the percentage to set how much over or under market value the vendor is trading, buying or selling.
- This percentage automatically updates the values shown in the calculator
- The percentages are adjustable by using the slider tool.

2. Card Selector