Buying an ecommerce store looks straightforward from a listing: revenue, profit, and a nice-looking website. The diligence that separates good buys from expensive mistakes goes deeper, into traffic sources, supplier relationships, fulfilment, refunds, and advertising dependence. An ecommerce business has more moving parts than a simple content site, and each part can hide a problem that does not show up in a headline profit figure. Working through the checks in this guide, in order, gives a buyer a realistic picture before money changes hands.

Verify sales against payment processor statements and bank deposits over at least twelve months, and match them against the store platform's own reports. Look for the gap between gross sales, refunds, chargebacks, and net deposits, because a store with high refunds or frequent chargebacks earns far less than its gross figure suggests. Check traffic by source: organic search, paid ads, social media, email, and direct visits. A store that depends on one paid channel for most sales is really buying an advertising operation, and if ad costs rise or the account is restricted, sales can fall quickly.

Also check seasonality and trends. Many stores earn most of their money around holidays or a particular season, so annualising a peak month overstates the business badly. Look at the same months year over year, and ask what drove any sharp changes: a viral product, a price change, an influencer mention, or a platform algorithm shift. Ask for the top-selling products and their margins, because a store whose profit depends on one product is fragile in a way a diversified catalogue is not. If the seller cannot break sales down by product, channel, and month, treat that as a gap in diligence, not a detail to skip.

Suppliers are the next critical check. Ask who supplies each top product, what the terms are, whether the relationship transfers to a new owner, and what alternatives exist if a supplier raises prices or stops shipping. A store dependent on a single supplier with no backup is one dispute away from having nothing to sell. Order a product yourself, as a mystery customer, and note the delivery time, packaging quality, and product quality, because the customer experience you inherit is the one buyers will judge you by. Slow shipping, damaged goods, or misleading product descriptions generate refunds and bad reviews that cost far more than they appear to.

Fulfilment deserves the same scrutiny. Find out where stock is held, who packs and ships it, what it costs per order, and how returns are handled. If the seller fulfils orders personally, work out how many hours that takes and whether you can realistically do it or afford to outsource it. Check inventory carefully: what is actually in stock, what is slow-moving or obsolete, and whether the inventory value in the sale price matches reality. Paying full price for stock that will never sell is a common first-buyer mistake, and a physical or video stock check before closing is worth the effort.

Rebuild the profit figure from source documents, not from the seller's summary. Include product costs, shipping, platform fees, payment fees, advertising, apps and tools, packaging, returns, and any freelance help. Watch for costs the seller does not count, such as their own time, which becomes your time or a salary you must pay someone else. Also check for hidden liabilities: pending refunds, gift cards or store credit outstanding, subscriptions that will continue after sale, and any advertising account issues or policy warnings that could restrict future ads.

The handover should be planned before closing, not improvised after it. List every account to transfer: store platform, domain, payment processor, advertising accounts, email platform, supplier contacts, and any tools. Agree a transition period during which the seller introduces you to suppliers and answers operational questions, and agree how customer data will be transferred lawfully. An ecommerce store bought with verified sales, transferable suppliers, honest fulfilment costs, and a planned handover is a real business. One bought on a headline revenue figure alone is a gamble, and diligence is what turns it from one into the other.