I would jump on to realestate.com can check out how much similar/comparable properties are selling for and renting for then base your decision on what you find. If price and rent is comparable should be ok

Things that will help us answer your question better
How much do you have as a deposit?
Is this your first property ?

Yes it really depends on whether you need to sell. What is your strategy ?
Look at other factors such
What is the population in the area ?
Is this is an area that population is growing or decreasing ?
What is vacancy rate in the area?
If you can’t sell can you rent it out ?
What is rental income ?

As you are still young it is best to try and finance in your Super as Terry say you can not refinance so best to purchase properties you can get finance that way you are leveraging and building your asset base using the banks money.