When looking to invest in property. Find property manager you trust and ask advise. I am a Property Manager in Brisbane and find that investors buy through a sales agent then come to us and say we were told we can rent this for $x and the property is not in a great area or it is in a flooded market area and is not worth what the sales agent advised.
So get to know a good PM and they will always give great advise when buying an investment property.