Yep, Ive done it and it worked.
I was interested in a place that had been on the market and had no takers at the initial price, and the owner had temporarily taken it off the market as he was going to do some repair work. It was tenated. Agent wouldnt let me look at it but said I would go on the list of people who wanted to look when it was relisted.
I happened to mention to an agent who I was listing another rental property with (for rent) and he actually knew the agent and got me a viewing. Agent said owner wanted to fix the property up a bit and then was going to relist at a higher price to reflect improvements.
I had a look and saw huge potential (granny flat at rear, on corner block in a urban core zoning). Attached a 10% cheque to the written offer and after 1 day and a couple of back and forth about clauses, offer was accepted.
Conveyancing was interesting as owner owed tens of thousands in land tax and tried to get me to pay it

but that is another story.