Prior to the last GFC in 2007-08, a lot of these apartments were supposedly being significantly over valued. I had a valuer in to provide a market value on a property I was interested in purchasing , and they valued it for half of what it eventually sold for. I thought it sounded really low. From my experience valuations can be very inaccurate. So get a few different opinions.
$$$¡ Getting a valuation is like throwing money away.