Amazon Australia is young and, only recently, the largest marketplace in the country. It arrived long after the local shopping habit had formed, passed eBay on share within the last couple of years, and still runs thinner category catalogues than the American equivalents off a fulfilment footprint that covers a continent from a handful of sites. That combination produces a specific opportunity and a specific ceiling: a properly built listing can reach a real rank position in a category where the competitive set is a dozen sellers rather than four hundred, and it will still be selling into a much smaller pool of buyers than a US listing of the same quality. Both halves have to be said out loud before anyone commits a budget, because the accounts that disappoint here are usually the ones scaled against American benchmarks.
eBay is the part visiting agencies get wrong in the other direction. It is no longer the biggest marketplace here, but Australians took to it early and a very large habitual buying population stayed, and for a defined set of categories — parts and accessories, replacement and compatible items, tools, outdoor and camping gear, discontinued lines, anything searched by model number — it still carries real volume rather than a nostalgia listing. Whether it belongs in your plan is a category question, not a brand-prestige one. Beyond those two, TikTok Shop is worth testing where the product demonstrates on video and the margin carries a creator commission on top of the platform fee, and the smaller local marketplaces have been through enough ownership and strategy change in recent years that we check what a channel actually is today before recommending catalogue work for it.
The economics are where an Australian marketplace plan is won. Domestic freight is the dominant variable cost in this market, and a national marketplace price set from a Sydney-metro delivery cost quietly loses money on every order heading to WA, the NT or regional NSW. So contribution is modelled per unit after referral fees, fulfilment, GST treatment and real zone freight, and advertising targets are set from that rather than from an ACoS figure. Then the channel is pointed at what it is good for. Marketplaces put your product in front of Australians who have never heard of you; the reorder, the bundle, the refill subscription and the relationship belong on the Shopify store you own. Package inserts, permitted platform follow-up tools and marketplace-only pack sizes are how that is built without breaking a policy.