What does a purple Feathered Mask trade for?

Hi everyone! I was hoping that the Feathered Masks would go on sale this October but sadly it was not to be. I'm new to the game and know very little about Adventures but I'm about to start doing those. Can anyone recommend what people might be willing to trade for one of these, that is obtainable now? All I have are two Rare Doctor's Bags (blue color) that I got from a daily spin but I doubt those are worth much. I'd just like to know what to aim for.

Any help would be greatly appreciated! Thanks in advance.