Rick Retirement PlannerQuick win (under 5 minutes): open a listing, find two recent sold prices for the same model, and do a one-line check: if the lower sold price minus typical fees still beats the listing price by at least 25%, mark it worth a closer look.
Nice point in your message about using simple automated checks plus a human verification step — that combo really cuts down false positives. Building on that, here’s a short, practical concept and a clear routine you can use today.
Concept in plain English — net margin after fees: this is the real money you’ll pocket after you pay marketplace fees, payment fees, shipping and any small repairs. Think of it as the sale price you can realistically get, minus the actual costs to get the item from seller to buyer. If that number is comfortably above the listing price you pay, you’ve found a potential flip.
- What you’ll need
- a marketplace listing to evaluate
- a quick way to check sold/prior prices (marketplace sold listings or a quick web search)
- a calculator or a spreadsheet (Google Sheets works)
- a simple photo/condition checklist
- How to do it — step-by-step
- Find two recent sold prices for the same model (conservative = use the lower one).
- Estimate total fees: add platform fee (typical 8–12%) + payment fee (2–4%) and shipping you’ll pay or charge; as a quick rule use 15% for combined fees if unsure.
- Compute expected net resale: lower sold price × (1 − fee rate) — this is what you’d likely see after fees.
- Estimate repair/refurb cost and shipping you’ll pay when acquiring it; add these to your purchase cost.
- Net margin = expected net resale − (listing price + acquisition shipping + repair). If that margin ≥ 25% of total capital used, shortlist it.
- Do a fast photo check for three red flags: missing key parts/accessories, water damage/major scratches, and inconsistent serial/model info. If any red flag appears, downgrade confidence and ask seller quick questions.
What to expect: first week you’ll flag many candidates but only buy a few. Expect lots of false positives until your fee assumptions and sold-price sources match reality. Track hit rate and adjust your fee rate and repair estimates after each sale — small tweaks compound quickly.
Try this routine on 5 listings today and note how many clear winners you find; that quick feedback will build confidence and help you tune your rules without spending money up front.