Resale Inventory & Profit Tracker — eBay, Mercari, Poshmark & Marketplace Profit Spreadsheet (Excel + Google Sheets)

A buy-to-sold tracker for resellers that answers the only question that matters: what did I actually make, after fees and shipping?

• One row per item from the day you buy it: source, cost, listing price, then sale date, sale price, platform, that platform's fee percentage, real shipping cost, and other costs.
• Net profit and ROI calculate themselves the moment a sale is entered — no more guessing from the sale price.
• Automatic status (In Stock / Listed / Sold) and days-held for every item.
• Dashboard: items bought and sold, sell-through rate, total net profit, average profit per sale, average days to sell, and — the number most resellers never see — how much cash is still tied up in unsold inventory.
• Profit by platform, so you can see which marketplace actually makes you money after its fees take their cut.

Includes realistic example rows (clearly marked) and a quick-start guide. Works for thrift flips, yard-sale finds, clearance resales, collectibles — anything you buy to sell again.

Works in Microsoft Excel and Google Sheets. One-time purchase, no subscription.