Australia is not a licensed country, so there should be no issues with the product passing customs. The voltage difference will be an issue, so a converter is necessary, though I’m not sure what effect this would have on the machine.
The main concern will be processing payment and delivery from a private seller across the other side of the world. You will have no legal recourse if the package is damaged or lost in transit, if the machine is broken or isn’t as advertised, or the seller may simply choose to take your money and not send anything.
A second-hand Apilus is difficult to find in Australia. The easiest blend-capable machine to find second-hand in Australia is the Sterex SX-B. This is not because the machine is bad; it definitely does everything it needs to. It just happens to be one of the least expensive machines you can buy in this market. A lot of beauticians attempt to offer electrolysis services, and then realise it’s either too difficult, too time consuming, or not as profitable as other services, so they sell the machine usually for half price.
You can find them on FB marketplace, eBay or Gumtree. This is pretty much the only brand of machine that is still in production and regularly available second-hand here.
Sorry to say your choices here are limited. I like the SX-B though…