When getting building insurance quotes should I put 'rebuild value' at around the purchase price of 250k(buying in west Sydney), or should I estimate a more realistic value of actually replacing the building component in case of fire etc? If I overestimate rebuild cost and pay a higher premium, would I get a payout from insurance then organise rebuilding, or would insurance organise repairs, and stop halfway if they can't get repairs done for the estimated rebuild price I've given them?