just had this reply from the seller...
go back to the post office and fight with them, there should be insurance on it of the valuve i put down, should be 500 or 550 i am not sure, but man i swear on my life i sent them they were brand new, and i have shipped 4 set of cams like that never had an issue, 1 to england, 1 to aus, and 1 to florida and 1 to u. man i am super sry to hear that. i am not sure what to say.... .? but i sent them they were brand new still in the plastic with oil in them. I would fight with post office and make sure u do it soon cuz they will prob say u did it..
good luck
cheers
rob