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The Arbitrage Hero blog

News, tips and tricks for FBA sourcing and online arbitrage - from the team building the tool.

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Amazon FBA vs FBM for online arbitrage: which costs less per unit in 2026?

In three US examples priced $10 to $50, Amazon's published FBA charges for one unit are calculated at an estimated $3.95 to $10.03 at the 2026 peak rates, against $7.33 to $20.24 of USPS Ground Advantage postage alone. For the hypothetical 5 lb unit, the FBA charges pass zone 1 postage after about 1.4 to 1.8 months of storage if the peak rates stay the same, before the costs the comparison leaves out.