What is the 3x rule in reselling?
The 3x rule says list an item for at least 3 times what you paid for it. The logic: if you source at $10, list at $30 — the margin after platform fees (~15%), shipping (~$10), and packaging (~$0.50) still leaves a meaningful profit. The rule is a floor, not a ceiling. High-demand or branded items should be priced at market, which can be 5x, 10x, or more above sourcing cost. The 3x rule prevents the common mistake of underpricing items from impatience.
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Key things to know for Australian sellers
Australian online selling has its own quirks: GST registration thresholds, Australia Post rate structures, and platform-specific buyer behaviour differ from the US and UK advice you'll find most readily online. Checking ATO guidance directly and using the Australia Post postage calculator for accurate quotes are good starting points.
Using multiple platforms together
Most successful Australian resellers end up selling across at least two platforms. The marginal effort to list on a second platform is much lower if you already have photos and a description, and reaching two different buyer pools meaningfully increases your chances of a sale.
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List once, sell everywhere
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