I've mainly had good experiences recently, but I'm in Australia. I try to only buy from the stores that are associated with the Prime offering, as I figured it'

I've mainly had good experiences recently, but I'm in Australia. I try to only buy from the stores that are associated with the Prime offering, as I figured it'll help filter bad things? My items have included a number of different signal cables, coffee bean storage canister, knife sharpener, microfibre cloths - all top notch quality. I had one shipment get lost in the AusPost system which was frustrating (the tracking was active, but it ended up in a truly weird place), but received a refund as soon as I escalated it. And I do recall needing to vet the knife sharpener as there were a bunch of fakes; the one I ended up with was top notch. I wonder if the Australian branch performs some vetting, or if I've just been lucky.