overseas investor - only could buy new - what to do?
You can buy new, completed but never occupied. I bought my current home when I was still a UK citizen just after completion (probably an OTP sale that had fallen through) and the developer rebated half the stamp duty. It meant that I saw exactly what I was getting for my money.
I've bought two OTP units in Melbourne CBD in the past, sold each one after seven years and barely got back what I paid.