BlackBerry

VZW told me, both via an internet chat with a rep and at a retail store, that they cannot put a data block on a blackberry device line, but they can on a windows mobile phone line. While it may seem odd to want a blackberry with out the data package, that is where I find myself right now. I am in serious need of some time/tasks/information management help. Having used two palm pilots, a treo 650, and one ipaq, I am ready to try a blackberry. Right now, though I am already spending a little over $200/mo for cellular service for my family, and I just don't want to spend any, or very much, more each month.

Initially I thought I would add a line with a BB curve and just get the data blocked. As mentioned above, VZW says this can't be done. So, my question is, is there any reason why I can't buy a BB on ebay or something, and just use it like a PDA?

CB