I just checked out USPS postage charges as it occured to me that the $507 semed a bit high and also that the USPS have restructured a lot of their o/seas charges since I last imported anything, anyways the USPS options are..........:
..........the $507 relates to the Global Express Guaranteed service which is the most expensive and 70lb is the maximum weight. A 10lb parcel should cost approx., $131 for a 1 - 3 day service.
Express Mail International has a limit of 44lb, a 10 lbs parcel costs approx., $63 for a 5 day service.
Priority Mail International has a 66lbs limit, a 10lb parcel costs approx., $56 with a 6 - 10 day service.
These figures are probably $US, don't include insurance and from past experience arbitary........take the same parcel to 3 different US Post Offices and you'll get 3 different prices.
ChrisO