The same as non-human animal life. High. I see both as equal in worth and worthy of existing. So, yes, all of your lives have the same value to me as the life of a tree frog sticking to my face. Only, if a human was sticking to my face, I'd be able to ask said human to kindly unstick themselves. The frog is innocent in this situation as it probably didn't mean to bother me with its frog butt in my face.
So, I'll just put priceless. And no, there isn't a frog stuck to my face right now.
Personally, I'd consider this more of an interesting discussion, but this is coming from someone who ponders pretty much everything. Besides, humans are a violent species and as a violent species, professions that ask for payment after a violent deed is finished or a death is made are only natural occurrences. We don't really do the whole peace loving thing very well... In fact, bonobos do the whole being peaceful thing far better than us and they are considered hilarious when you find out about how they greet one another. There is still killing in Bonobo society, but it certainly isn't to the extent of humans and chimpanzees.
Strangely, the most violent species are often the most intelligent... This is more of an observation that only has observation to give than something that can be factually made true. Chimpanzees have wars with one another, for example.