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In 13 years i had one....I Send all coins signed for min....although they not covered not one item has failed to reach buyer except one time i know just know.... it wasn't signed for and the person took advantage of that..
As who on the day after posting says the items not arrived and demands a refund. A scammer..
Guess i been lucky at least not had any not as descibed and send you back a bu in place of a proof etc.
sign for works for me on most occasions and i have sold a few things i made good profits on so not all doom and gloom but is getting harder to do.