Seven Mistakes New Resellers Make in Their First Year

Everyone who has been reselling for a few years has a list of expensive mistakes they made early on. The good news is that most of these mistakes are predictable — which means you can learn about them without having to live through them.

1. Buying without researching sell-through rate

The most common expensive mistake is buying inventory that looks like it should sell, without verifying that it actually does. Before you buy anything to resell, check recent sold listings. If you can't find recent sold comps at a price that leaves you a meaningful margin, don't buy it.

2. Ignoring platform fees when calculating margin

Platform fees eat into margin in ways that are easy to underestimate. eBay charges a final value fee of 12–15%. Depop charges 10%. Payment processing adds another 2–3%. Shipping costs add more. By the time you account for all of these, a listing that looked like a 60% margin might actually be 30%.

3. Underestimating shipping

Shipping is where many early resellers quietly lose money. A jacket that looks like it'll ship for $8 in a poly mailer might actually need a box, bringing the cost to $15. Weigh items before listing, use real shipping calculators, and when in doubt, round up.

4. Pricing based on listed prices rather than sold prices

Listed prices are what sellers want. Sold prices are what buyers will actually pay. Always filter for sold listings and use that as your anchor.

5. Spreading across too many platforms too early

Managing inventory across five platforms is significantly more work than managing it on two, and the incremental sales from the additional platforms often don't justify the overhead. Pick two platforms to start, learn them well, and add more when your operation can absorb the complexity.

6. Taking poor photos

Poor lighting, cluttered backgrounds, and shots that don't show condition clearly will cost you sales. Good photos take time to get right, but the investment pays back quickly. Show flaws clearly — buyers who discover undisclosed flaws on receipt are the source of returns and bad feedback.

7. Not tracking your numbers

A surprising number of people who resell for a year or more have only a vague sense of whether they're actually making money. Revenue minus purchase price isn't profit. A simple spreadsheet tracking cost of goods, sell price, fees, and shipping for every item is enough to know your real margin.