The UK regards percussion as a non shotgun for certification purposes. The USA also, so I am surprised by the $500 quotes as it should be possible to ship by common carrier postage.
Call one of the well known UK gun shops or possibly get a UK pal/aquaintance to bring it over in his checked baggage as his flight might be of less cost than the shipping cost and he would get a free trip to the states plus it is a much more secure shipping method as UK airports always hand carry guns onto the plane for no extra cost due to the security paranoia thats everwhere in the UK today.
US customs may be interested in the value though.
Martin

Last edited by bavarianbrit; 05/19/10 06:55 AM.