Go with USPS Airmail Parcel Post. I've shipped numerous players to the UK, Germnay, Switzerland, etc using this service and it usually takes about 7-10 days and costs around $35 ( I pack them up real good too ).

You will have to fill out an extra customs form and make sure you fill out one of the blue insurance forms too!

UPS and Fedex seem to be outrageous on the international shipping.