Character with attnement trading.

Hello,

I have few question about trading attuned character .
Some character have already done the attunement and have the item like the [Medallion of Karabor] or [Urn] from NB. Meanwhile their inventory is not included for character trade. Is there anyway to refund some quest reward after buying them? other e.g. The kara rep rings and [Violet Badge], [Amulet of the Torn-Heart] from [The Cipher of Damnation], [Phoenix-fire Band] From [Trial of the Naaru: Magtheridon].

Thanks,