Skull

Well, I've got a wolf skull and according to the Dichotomous Key I checked with my science teacher, it's a gray wolf. Which is cool. But (and I hate to ask this question) I was wondering if anyone knew how much it would sell for?
I really love this thing, I mean I just found it when I was a kid, It made me soo freaking happy, and it stays in my closet. But right now we could REALLYYYYY use the money from it, and I've seen that replicas cost about $200. It's in good shape, has MOST of its teeth and of course it's front canines.
It's not that perfect white like most are...it looks rugged and way more realistic than those. (Cause it is real. ) But...anyways, just tell me if you know anything about it! And Hey, it may even be illegal to sell stuff like that, I REALLY don't know...so...help?