I was only really looking to trade for the bones if by some miracle someone wanted to.
I have yet to sell or even trade anything I've aquired at Seer/EM events to date, but to be honest I'm not as connected to the new EM's / events like past seasons so I thought maybe I could trade for a more "canine" like item.
If no one is interested in trading I probabaly wont sell them off, because like you I believe our EM items should stay on our shard.