Back to the difference in prices for a moment, I pretty much stopped buying almost anything on TradeMe because I got sick of the inflated rural delivery charges. Maybe there are good reasons for this. Maybe it is someone else's fault. I don't know and I don't really care. What I do know is that I often make small purchases, a cable or connector, something costing just two or three dollars, and traders here want $6 or more to send it to my rural address. I have heard that some do this to try to bypass TradeMe's increased success charges. That doesn't matter to me. What matters is that the cost of delivery is often more than the cost of the item.
Oh right, being rural is so much farther away and costs so much more to deliver to. Except that it doesn't. Regular post is almost never available as a delivery option but that is precisely how unsigned courier items are delivered. They are all brought by our regular rural postie, no difference whatsoever in the service, just the enormously inflated cost of it.
If I buy the item from Aliexpress instead, it is not only cheaper to start with, it comes to my rural address free of any delivery or postage charge. In my experience, it also often gets here faster than parcels from Auckland. Under these circumstances, I can't think of any possible reason for wanting to buy local. 15% extra is nothing compared to the rural delivery rip-off.