if it is a good offer or bad offer it all depends on your current situation!...

are you at least doubling your NET income? If not, it is not a good offer, if  you are doubling it, it is ok, if it is approaching 3 times of your current income then it is very good offer.

that is the ruleee...

if u ask my opinion u have to at least double your net income to come here and leave behind your family and beautiful aus, etc...

good luck mate...:)