Depends what you want it to look like.

A taxidermist has many years of experience and can produce a life like squirrel or rabbit mount, I don't think someone who has not mounted one ever can replicate what a taxidermist can do, after you do 40 or 50 then they will start to look descent.

I get $180 for squirrel and about the same for a wild cotton tail Rabbit.

Give it a try.

Not sure where you are what they go for.
Good luck.