TS referring to dslr camera i think, 4 years extended warranty from Harvey Norman will cost you $285, like wat some said, the extended warranty can buy you a piece of mind, but this can also be done with extra care when handling your equipment.
i also faced the same dillema a few months back, in the end i decided to get the EW for piece of mind, because that's my first dslr, and i'm going to stick to it for the coming few years, just go ahead and get the extended warranty if you feel like getting.