How is it possible for cheap items in Australia to have free shipping?

[elecduino]

How is it possible for the $4.95 item in NSW to have free aus post shipping to all of australia:

https://www.ebay.com/itm/Analogue-Alcohol-Ethanol-Sensor-MQ3/283442677525?hash=item41fe800715:g:rV4A...

I am trying to sell on ebay and the minimum for aus post shipping is $8.00.

Thanks

[lyndal1838]

Who knows?

Maybe it is a loss leader....maybe the cost of postage is built into the item price....or maybe he is dropshipping from China where it is still possible to get free postage.