Reseller Profit Tracker: True Profit, Fees, Sell-Through Rate and Dead Stock

Why gross sales lie to resellers

A $40 sale feels like $40. Then the marketplace takes its selling fee and payment processing, you pay for the label and the poly mailer, and the item cost you $6 at the thrift store. What's left might be $15 — and that's before supplies, subscriptions and the miles you drove to source it.

A reseller profit tracker needs to do four things:

1. Know each item's cost — what you paid plus repairs, and a fair share of any bulk lot.
2. Work out the fees on every platform you sell on.
3. Show true profit per item and per month — including cost of goods sold.
4. Watch what isn't selling — your sell-through rate and stock that's gone stale.

How Flip helps resellers

Flip, the VaultlyApps reseller profit tracker, is built for eBay, Poshmark, Mercari, Depop and Etsy sellers:

• Inventory from sourcing to sale — SKU, cost, storage spot, list price and every platform an item is cross-listed on.
• Fee presets for nine platforms, all editable, with a live true-profit preview on every sale.
• Bulk lots split one price across the items fairly.
• Dead-stock alerts — listed items age from fresh to dusty, with a next step for each.
• Sell-through rate, days to sell and the best platform per category, plus sourcing ROI per thrift store or estate sale.
• Expenses, mileage and P&L reports, with CSV exports for your bookkeeper.

Example: one month of flips

A part-time reseller sells 23 items for $1,456. Fees and ads come to $229, labels and packaging $119, and the items cost $245. Gross profit from sales is $863; after $52 of supplies and $7 of mileage, net profit is about $804 — and with 23 sold and 37 still on hand, the monthly sell-through rate is 38%.

Check the numbers yourself

Use the free sell-through rate calculator and the profit margin calculator, then read how to calculate your true profit as a reseller for the full method. Reselling full-time? The self-employment tax calculator estimates what to set aside.

How you get it

All VaultlyApps apps are a one-time purchase on Etsy — no monthly subscription. They install like an app on iPhone, Android, iPad, Mac, Windows and Chromebook, keep your data private on your own devices (no marketplace or bank login), and can sync between your phone and laptop with a 6-digit code. Open the free live demo first to see if it fits.