carFlippy: a SaaS web app, concept to live in six weeks
carFlippy is a self-serve SaaS product we designed, built and now manage end to end. Paste a car listing and it surfaces estimated profit, ROI and live market comparisons in seconds — the kind of bespoke web application we build for founders and businesses.
Car flipping runs on research that takes too long
Buying a car to resell at a profit is, underneath it all, a data problem. Is the asking price fair? What do comparable cars actually sell for? Is there enough margin once you factor in the work? Doing that properly means trawling eBay, Gumtree and the wider market across a dozen browser tabs for every single vehicle — slow, repetitive, and easy to get wrong when a good deal needs a fast decision.
The goal for carFlippy was to collapse all of that into a single answer: paste a listing, get an honest read on the profit, the ROI and the live market in seconds — so a flipper can spend their time on deals, not spreadsheets.
What we built
A complete, multi-user SaaS product — not a prototype — designed and engineered end to end.
Market analysis engine
Paste a listing URL or registration and the app scans eBay and Gumtree in real time to pull comparable vehicles and live market pricing — the data a flipper would otherwise gather by hand across a dozen tabs.
Profit & ROI estimates
Every listing is scored for estimated profit and return on investment, with a clear breakdown of source data and price so the user can see how the number was reached, not just trust it.
Personal dashboard
A logged-in dashboard with an opportunity feed, a watchlist and search history, so users can track vehicles over time rather than re-running the same checks.
Accounts & authentication
Secure user accounts so each person's watchlist, history and preferences are their own — the foundation for a proper multi-user SaaS rather than a one-off tool.
Custom data pipeline
A bespoke pipeline gathers, cleans and normalises listing data from multiple sources so the figures shown to users are consistent and comparable — the hardest and most valuable part of the build.
Built in Next.js
A fast, modern Next.js application, hosted and fully managed by us, so it stays quick, secure and online without the owner touching infrastructure.
Concept to live in around six weeks
The hard part of carFlippy isn't the interface — it's the data behind it. Pulling live listings from multiple marketplaces, cleaning and normalising them so a car on eBay can be compared fairly with one on Gumtree, and turning that into a profit and ROI figure a user can trust took a custom data pipeline built from scratch. On top of that sits a fast Next.js application with proper user accounts, a dashboard, watchlists and history.
We took it from concept to a live, production product in around six weeks, and we host and manage all of it — so it stays fast, secure and online without the owner ever touching a server. It's the same approach we bring to custom web apps for clients: take an idea, build the genuinely hard parts properly, ship it, and keep it running.
Live, managed, and growing
carFlippy is live at carflippy.com with an early base of around a dozen active users, and it's growing. As a new product it's still early, but it does the thing it set out to do: turn an afternoon of manual research into a few seconds. Just as importantly, it proves the model we offer clients — a real, multi-user SaaS taken from idea to live product quickly, then hosted and maintained by the same two people who built it.