so this is what happened. was running xFC with a rando cross shard group and when we downed totek he dropped ageless pauldrons which are epic tanking shoulders. I was tanking and the only warrior in the group. I already had the shoulders from a previous run so i told the group if anyone needed it for OS to go ahead and need it... but it was too late and everyone had already greeded. of course, i won the greed the role, so i asked anyone if they needed it for OS and got one response so i tried to trade it but i got an error that said cant trade cross shard...

long story short, my suggestion is to make cross shard trade available while in the lfg party