About ResaleMargin
Built by e-commerce flippers, for flippers. We provide 100% free, reliable, and client-side calculators to empower independent sellers.
Why We Built ResaleMargin.com
Over the past few years, major online resale marketplaces have frequently restructured their fee schedules. Depop dropped seller fees to 0%, Mercari introduced buyer service and payment fees, Poshmark adjusted shipping tiers, and eBay updated final value percentages across dozens of subcategories.
For solo flippers and part-time side hustlers, calculating whether a $20 thrift purchase will actually generate a profit became frustratingly complex. Most existing online calculators were cluttered with invasive popups, slow to load, or out-of-date by several years.
We built ResaleMargin.com to be the fastest, cleanest, and most transparent utility on the web: a tool where you enter your cost once, and immediately see where your item will earn the highest net payout.
Our Core Principles
No paywalls, no email captures, and no account registrations required to calculate your profit.
Your sale figures and product costs never touch a server database. All calculations execute directly in your browser.
We monitor official seller policy changes across Poshmark, Mercari, Depop, eBay, and Etsy to ensure formulas remain accurate.
Designed to run seamlessly on your smartphone while you are out sourcing inventory at thrift stores and garage sales.
Independent & Unbiased
ResaleMargin.com is independently owned and operated. We are not owned by, affiliated with, or funded by Poshmark, eBay, Mercari, Depop, or Etsy. Our calculations are unbiased and aim solely to present factual, mathematical estimates for online sellers.