I have purchased many items on eBay and what surprised me is seller items getting sent via tracking, e.g. I bought USB-C cables, 4 for around $10 which includes delivery to my place with tracking information. If you check with AusPost their cheapest published rate with tracking will be between $6-$9, even if it is $6, those cables I know won't cost $4 for the seller and he need to make profit. Could someone please who knows the answer respond.

Looking for cheaper way to deliver with tracking provided.