when you can get one for free from a wireless carrier? The ones on E-Bay even say which carrier the phone will work with so why not just get one from the carrier?
There is no reason to buy a Blackberry on Ebay unless you need a replacement.
If you go to wirefly.com you can get a Blackberry Curve 8330 and a Blackberry Pearl through Verizon.
I am not a troll salesman, I actually got a BB curve through Verizon for nothing. As long as you are willing to sign a 2 year contract you can get better phones if you check out an online wireless shop rather than going to a Verizon, T-Mobile, AT&T, or any other carriers store.