Dashboard
Track your reselling profit in one place
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Complete item

Quick add

Just the essentials — add details later at home

This creates a draft item. You'll be reminded to add category, platforms, list price and storage when you're back at home.

Add job lot

One purchase price split across multiple items — e.g. 58 DVDs for £15

Add item

Log your new stock

Check every platform this item is currently listed on.
Repairs, cleaning, packaging, authentication — anything you spent to make this item sellable. Added to your cost of goods for accurate profit calculation.

Record a sale

Enter what you sold it for and what you received

This is the money that lands in your account — after eBay/Depop/Vinted fees and any postage you paid. Reseller OS will automatically deduct your original cost to calculate profit.

Return to stock

This item will go back to active inventory

Write off item

This records a loss and removes it from stock

Add sourcing trip ·

Track where you went and what it cost

Auto-calculated from your MPG & fuel price in Settings — edit freely to use actual spend.
Entry fees, parking, tolls, etc.

Add expense

Unsaved changes

Download a backup before leaving?

Welcome to Reseller OS

Your personal profit tracker for reselling — charity shops, car boots, house clearances, and more.

Everything stays on your device. Your data is saved in your browser — no account needed. Use ↓ to back up anytime.

Log your stock

Tap the + Add button to log a new item. Fill in what you paid, where you got it, and where it's stored.

Tip: Always fill in the Date purchased — this powers the stale stock alerts that flag items sitting over 90 days.

Got pre-existing stock?

Toggle Legacy stock when adding old items you owned before you started tracking.

Legacy items are included in all profit and value figures, but excluded from time-based analytics like avg days to sell — so they won't skew your numbers.

Track your sources

Record where each item came from — charity shop, car boot, house clearance, Facebook, and more.

Tip: Also log it as a Sourcing Trip to track travel costs and see the full ROI on each run.

Mark items as sold

Tap any item, then tap Mark as sold. Enter the sale price and what you received after fees and postage — Reseller OS works out your profit automatically.

Gross profit = sale price minus platform fees and postage. This is what hits the P&L report.

Tracking platforms correctly

When you add an item, tick every platform you plan to list it on. When it sells, untick the platforms it didn't sell on before marking it as sold.

Why it matters: The Profit by platform chart in Insights credits the full sale profit to whichever platforms are still ticked at the point of sale — so your numbers stay accurate.

Aging alerts, built in

Items sitting 90+ days are automatically flagged on your dashboard and in inventory.

Dashboard: Shows a banner counting stale items.
Inventory → Stale chip: Filters to aged stock so you can relist or reduce prices fast.

Trips, expenses and reports

Log sourcing trips with mileage and fuel cost. Set your car's MPG and current fuel price in Settings — the trip form will auto-calculate your fuel spend, which you can override with the actual amount you spent.

Why not the HMRC mileage rate? That rate (45p/mile) covers wear, insurance and depreciation — only appropriate if the car is primarily used for business. Since this is a personal vehicle, actual fuel cost only is the correct deductible expense.

You're ready!

Tap + Add to log your first item. Hit Help in the top bar any time to see this guide again.

Shortcut: Press Escape or to navigate. Data auto-saves every 5 minutes — or force-save with ↓.