I am in the same boat...just bought a place in North Perth and the oven is partly rusted out
The house i recently built has Technika oven and hot-plates - the oven never worked from new and they had to send out someone to repair it...after that something went wrong with the thermostat and it ended up cremating a couple of what would have been nice roasts.
I would personally avoid that brand..but its a case of you get what you pay for and they are cheap...