I am a Crackberry. I am sadly an owner of a Blackberry. I bought my case on Canal Street from a local street vendor.
I paid $5 bucks. Is that not a bargain? Most of my friends who have bought the same case from the cell phone stores often pay anywhere from $15-$20. What a difference!
It's such a steal that I was tempted to buy other color cases to match different outfits. Yes, I have a shopping problem...
They also sell cases for other phones, IPods, and other accessories. Just stroll down Canal Street, anywhere from Mott to Broadway and you should see these guys around.