As a rule, I don't really feel comfortable in trading any of my higher dollar eternal cards for anything but eternal/commander staples,not necessarily standard cards.  As for some of my other eternal/commander cards that are of a more modest price range, I have no problem in trading them for standard cards.  Also, I have an unopened From the Vaults: Relics that I am willing to trade for Eternal cards and what have you. 

Notice!  Due to job constraints I will be taking a hiatus from trading until Jan 2014 at the earliest.