With Marty - most likely won't yield much fruit.
But if you want to give it a go, order a val and hope for the best. Most of the time it wont work, but that doesn't mean always.
Variable. 20% deposit. Exit costs will be low (around 1000). Could potentially be a clawback from the broker, but i would think most brokers dont charge these for existing clients.
I've seen it before, in Sydney. No renovations done, wasn't even purchased BMV. The market improved and the val came back in strong within 6 weeks of settlement.
Hit up Brady and see if its worked.
Cheers,
Redom