I think you are getting mixed up between mp3.com.au and mp3.net.au? mp3.com.au is not listed on Netfleet, but mp3.net.au is listed on Netfleet and is for sale.
However, as pointed out, verification for domains is important. We do manually approve every single domain name on Netfleet, however in the coming weeks we will be changing this process for a much tighter system of actually verifying domain ownership via the details from the registry - which is actually pretty complicated, but it is needed. This will guarantee the owner has listed the domain for sale.