You are close, but the range given to me was a bit higher than that. It's too soon for me to comment on how I am finding dealing with Ray White Oakleigh. I'll be in a better position to comment once auction day has come.
It wasn't my choice to not put a price range on my property. I have noticed that properties that they have advertised have no price range.
If you can get at least two people interested, then it could go into the low 600's. I like the reno, did you do it yourself? (was this your PPOR or your investment property?).