Well, I'm not one of the best ones to answer this question, but I collected these, and from experience, I can probably say that while trading with other traders in the parks for these pins, those two and a few others (like Space Mountain, Rock'n'Roller Coaster, Philharmagic, etc.) tend to be the ones they go after, if they trade fast-pass for fast-pass.
I don't know about monetary value, but I'd say for a hidden mickey, they are fairly sought after, in this collection.
Again, this is just from my personal experience :hs: