I have someone that wants me to make a set of toppers like the ones on my koi cake. I know how much I charged for the whole 10-inch cake when I did it, but in terms of just making the toppers, I really have no clue. Anyone just sell toppers? How do you price them out?
(The cake in question is in my photo collection here on CC.)
I sell custom toppers starting at $75 and going up based on how detailed they are. For those it's pretty much just a time thing, so figure out how long it will take, what your hourly rate is, add the cost of materials, and there you are.