I'm in the US, and in the process of selling a bass to a buyer in Melbourne Australia (postal code 3000). But in looking at the shipping costs I think that's going to kill the deal. The box is 44" by 18" by 7", and weighs about 15 pounds. Value is about $700. The shipping estimates I'm getting from USPS and FedEx are in the $400 and up range. Is this accurate? Anyone have any suggestions? Thanks!