How much is my blackberry worth?

-I bought it in november for $250. I bought a case for it and it's been on it since November so there's no scratches or dents on the outside. The screen has slight scratches due to being in my pocket. It works and runs great. I don't use it anymore because I got the iPhone. So now I want to sell my blackberry. So how much could I get for my excellent condition fully working blackberry curve (the latest model), a charger, and a case?$75.to $100.00 which is much more than most phones on a resale level