Templates for Resellers & Flippers.

Profit and inventory tools for resellers and flippers who source low — thrift stores, estate sales, garage sales — and sell across eBay, Poshmark, Mercari, Whatnot, Depop, Facebook and Etsy. Track every flip from buy to sale, apply the right per-platform fee, and finally see the real profit and ROI on each item.

Know what each flip actually made

The reseller's quiet problem is that a sale isn't profit. A $42 sale runs a gauntlet — the platform fee, the shipping you paid, and the true cost of the item (its price, the supplies it ate, and a share of the gas you burned sourcing it) — before any of it is yours. Most flippers track the sale price and call it income. The tools here track the whole story, so you know which flips, which platforms and which categories are actually carrying the business.

New to the cost-of-goods math? Start free with the Flip-Profit Calculator — no signup — then read what cost basis is for resellers and why the tag price isn't your real cost.

Working a real flip? Follow the how to track reselling profit tutorial, or weigh a spreadsheet vs reseller inventory software for the stage you're at.

Recommended tool

1 template

An owned workbook that tracks every flip's true cost of goods, applies per-platform fees, nets profit and ROI, rolls up by platform and category, and reconciles your 1099-K — in Excel and Google Sheets.

Where we fit

Most tools force a choice between a blank spreadsheet you build from scratch and a monthly app that's overkill. Ardent Workshop is the rung in between — structure you own.

  1. Blank spreadsheet

    Free, but you build and maintain every formula, tab and layout yourself.

    • Free
    • Infinite setup
    • No structure
  2. You are here

    Ardent Workshop

    Owned, structured, connected workbooks — a one-time price, yours to keep.

    • One-time price
    • Structured & connected
    • Yours to own

  3. Generic SaaS app

    Powerful, but overkill, rented and locked-in — built for someone bigger than you.

    • Monthly rent
    • Overkill
    • Lock-in

Running an operation that's genuinely outgrown the file? Ardent Seller isn't the generic SaaS app this ladder warns about — it's maker-first software built by the same workshop: your data stays yours, you can start free or pay as you go with no subscription required, and it's sized for your operation, not someone bigger. The platform to graduate to when a spreadsheet honestly can't keep up.

Reading list

Multi-marketplace strategy and the inventory blind spot that quietly eats reselling margin — written for actual sellers.