It happens in all cities.
You just need to have a loose plan on your criteria. I have seen parts of VIC with cf neutral of late. Like 2 bed unit/villa 20km from CBD $160k buy, rent $250pw.
In sydney I pick them up all the time.
Are there if you look in the right places.
$175k, rent $280pw.
There out there. I bout a 3 bed villa the other day for someone that will rent for $250 easy.