Once you know what product you want to sell, the next question is where it actually comes from. Sourcing is where a lot of the real risk in e-commerce sits — a great product idea can still fail if the supplier is unreliable, the quality is inconsistent, or the numbers don't hold up once you account for shipping and minimum order quantities.
New sellers typically source through one of a few routes: buying wholesale directly from a brand or authorised distributor, working with a manufacturer (often for private label products), or using online arbitrage, where you buy discounted retail stock and resell it. Each route has a different risk profile, different capital requirements, and a different relationship with the brand whose product you're selling.
Wholesale sourcing means buying genuine products in bulk directly from a brand or its authorised distributor, then reselling them. Many brands are cautious about who they approve as a reseller — they typically want to see a real, functioning business before agreeing to supply you. This is one reason having an actual website that presents your business professionally can matter during a brand's approval process, alongside things like your business registration and purchase history.
The most expensive mistake beginners make is placing a large first order before verifying the supplier and the product quality at a small scale. It's slower, but ordering a small test batch first — and actually selling through it — tells you far more than any supplier's promises do.
Sourcing isn't a one-time decision either. As you grow, revisit your supplier relationships periodically: pricing, quality and reliability can all drift over time, and what worked when you started may need renegotiating or replacing later.