I'm not sure why more people aren't more suspicious of this story.
The guy is traveling overseas. A $500,000 investment property of his was sold by supposed Nigerian scammers. He rushes home, after being notified by his neighbors, to halt the sale of a second investment property.
And, if you believe the comments about Australian law, he will get compensated for the sale of the house while the buyers get to keep it.. and this $500,000 that was wired to China just disappears.
Since the owner stands to benefit the most from this scam, I'm inclined to believe he is the scammer. Not some dude in an internet cafe in Abuja, Nigeria.