Free Reselling Tools
No account needed. Built for resellers who want to understand their numbers.
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Platform Fee Comparison
eBay vs Poshmark vs Mercari vs Etsy — every fee side by side. See which platform keeps the most money in your pocket.
Break-Even Calculator
Enter what you paid and your shipping cost. Get the minimum sale price you need to not lose money — on any platform.
Profit Margin Benchmarks
What margins do experienced resellers actually hit by category and platform? Use these numbers to know if your deals are worth it.
Reselling Glossary
Plain-English definitions of COGS, ROI, net profit, final value fee, and every other term resellers need to understand their numbers.
Want to track every sale automatically?
MarginLog logs your profit, fees, and analytics across every platform — free to start.
Start tracking freeFree · No card required