Salary - Senior Structural Draftsperson (CAD Technician) ?

I've been working in the UK for the last 8 years and have a job offer for a Senior Structural Draftsperson with an Engineering consultancy in Perth WA. Just trying to figure out what the going rate is for a full time position in Australia. Also are we getting hit by the credit crunch back home yet, heard the mining industry is not faring so well.....