How do you value mystery set chasers?

Just got off the phone with my Dad, went through all the Epcot event mystery packs. They did pretty well, only missing the Pluto. But they got a couple chasers, and since they aren't that interested in trading for a complete set of chasers they are wondering what to do with them. I think they are going to trade their Pooh chaser for a chaser that they want more. And I might end up with both of them :hsd: But it got us to wondering how do people trade these versus the regular ones or other pins? Does one chaser = 2 regular versions? What level of other pins are you looking to receive for a chaser?

I think it depends on the set . . . . not all mystery sets are valued at the same - case in point disney girls reveal conceal mystery set vs toy story reveal conseal set . . .

mystery set ????? are there any orange birds in that?????