wow! that's a whole heaping lot of critters.
some of them are kinda hard to find for sale, so comparing prices is close to impossible.
i always base mine one condition and current market value.
the one i was able to find was the sheep dogs. if you have the whole family and accessories it's worth about 30$. i think. it's all with a grain of salt. especially since they don't have any competition.
in the end... not very helpful... sorry.