Reseller profit calculator for UK flips

Why spreadsheets and rough mental math aren't enough

As a reseller you need to know whether a buy is genuinely profitable after fees, shipping and realistic selling prices. Spreadsheets help, but they still rely on you guessing the sale price from a handful of comps.

How FlipLens acts as a profit calculator

• Uses real marketplace data — FlipLens analyses comparable listings instead of a single sold item.
• Models platform fees — so you see an estimated net profit and ROI, not just gross revenue.
• Summarises risk — confidence and data quality signals show when the dataset is thin or messy.
• Rolls everything into a Deal Score — a quick 0–100 score to compare opportunities at a glance.

What you can calculate with FlipLens

• Estimated net profit per item after marketplace and payment fees.
• Return on investment (ROI) based on your intended buy price.
• How sensitive your profit is if you have to undercut the market to sell.
• Whether a niche is worth scaling or should stay a one-off experiment.

Using FlipLens as part of your sourcing routine

1. Scan potential flips while sourcing — in shops, at car boots, or when browsing deals online.
2. Check net profit and ROI — if the margin is thin or confidence is low, skip or negotiate harder.
3. Save the strongest flips to Favourites and use Saved Searches to repeat good patterns.

The same workflow works whether you primarily sell on eBay, Vinted, Depop, Etsy UK or a mix.

Turn your gut feel into a simple set of numbers

FlipLens is designed to give UK resellers a fast, repeatable way to estimate profit on each flip. Over time that adds up to better buys, fewer bad bets and more predictable cashflow.

Built for UK marketplaces and real reseller workflows. No spreadsheets required.