Honestly, the closest comparable trade I can think of is when the Flyers flipped Carter for Voracek, a 1st (Couturier) and a 3rd (Cousins).
I think in a vacuum, Carter had more value going into that trade, but Philly was more motivated to move him while Colorado has no issues holding off.
I'm really not seeing how Duchene would be worth Ceci, one of White/Chabot and a 1st when compared to the Carter deal, but that's me. If that's the asking price, which I have no issues with, I'd pass as the sens. Colorado isn't motivated to move him, so I don't blame them for asking for the moon, but that doesn't mean Ottawa needs to force a deal that they really shouldn't.