You should check in the "Marketplace" forum. (If you go to the main forums list and scroll down, it is near the bottom) There are fellow Crackberry users there selling new and used phones. That is where I got mine. Just make sure you look at the feedback threads to make sure you a dealing with a reliable person.
Posted from my CrackBerry at wapforums.crackberry.com
I have a verizon blackberry tour that I bought in October '09. It's in great condition and has a car charger. I'm 90% sure that I will be switching to sprint in early March and will be selling the verizon tour. If you're interested let me know!