I see this every day as you might expect.

The issue here is that this item was obviously made by Billy Lee on his kitchen table then flogged on eBay. You can buy all of the parts over the counter from several massive electronic market areas and put them together yourself.

The same goes for a lot of the LED lamps and fittings you see sold online. You can buy the aluminium shell, the PCB, the LEDs and the 230/12V LED driver and solder/screw it all together yourself. The problem is that usually "Billy" is from the countryside and has zero idea about anything other than a hoe. So the lamp you buy MIGHT be well put together and it equally might NOT be! You have no way of telling until you pull it apart and look.

Items made in proper factories (such as the Homepin factory in Shenzhen  ) are built to strict rules and methods. Look at a toaster in Woolworths (Made in China without any doubt) - sold RETAIL for under $10 and the quality is outstanding. It will meet or exceed all Australian electrical requirements and probably perform well for many years - all for LESS than $10! Pull it apart and the build quality will be obvious. Correct use of cable glands and clamps, correct terminals and cable terminating methods. Correct earthing wiring including paint cutting washers as required by Australian law.

I think the biggest problem here is that sites such as Fleabay have allowed "Billy" to whack any old shit together on his kitchen table and flog it internationally with virtually zero comeback so why should he care?

The fault, IMO lies fair and square on the greedy corporate eBay!!!