I recently bought a BlackBerry on ebay. Well it turns out it's like something in the 700's, very old. I am going to return it. I went back onto ebay to find a newer one and came across a BlackBery 8700 and it's for T-moble. I was just wondering people's opinions on it. Can you use the web? Will I be able to have t-zone? I am asking about this so I do not have to end up returning this one as well.

If you google "UNLOCKED BLACKBERRY 8700g PDA T-MOBILE AT&T CELL PHONE" IT should come up. I believe it's 60bucks.

Yes you can use the web with a BlackBerry Data Plan.

How to use BlackBerry on Generic Data Plan - BlackBerryFAQ

You'll have to get T-Mobile to give you the "feature enabler" to use T-Zones (now called T-MobileWeb). Spending the extra $25 on a real BlackBerry Data Plan is preferable, and way more effective use of a BlackBerry. The T-Mobile feature enabler is designed as a short-term solution to convince you to get the full BB data plan, so there's no telling how long they will keep feature enabler active on your account.

The 8700 is still a favorite with corporations because it's built like a tank and has no camera or memory card. The camera and memory card are security risks for companies and they often require devices without them.

Wirelessly posted

The 8700g is a good solid product, if a bit old nowadays. You will be able to put at least ver 4.5 device software on it.

See the article at blackberryfaq.com re buying blackberrys on ebay (that is, used blackberrys).

And as already pointed out, you will need the blackberry data plan to get the full use of blackberry features.