You've had the stock for a few weeks. Now you start seeing patterns. Some devices sell fast, others sit. This is when you should be paying attention to your sales data.

Look at your point-of-sale reports. Which models are repeat purchases? Which ones only sold because you discounted them? That's your signal. If something isn't moving at full price after a month, it's not going to. Cut your losses and don't reorder.

Also watch for customer complaints. If a specific device keeps coming back with issues—leaking, battery problems, charging port failures—that's a red flag. It might be a bad batch, or the product just isn't reliable. Either way, stop promoting it and talk to your vendor about a return or credit.