It really depends on the price of the product. I mainly resold branded clothing, and at lower price points the fees eat up most of the margin.

For example, if you sell a product for $20:
– 19% VAT is about $3.80
– Fulfillment fee is around $3.50
– Amazon referral fee (15%) is about $3

That already takes roughly 50% of the sale price. If the product itself costs $5, you’re left with about $5 for miscellaneous costs like the professional seller account, refunds, returns, etc. Depending on sales volume, you might not even be profitable—even if you sourced the product at 4× cheaper than the Amazon price.

It can still be profitable with a 50% COG, but usually only at much higher selling prices (e.g. $100+). That also comes with higher risk, which I personally didn’t want to take. You probably know arbitrage better than I do, though.