Please do not use "text speak" when posting on this forum. We have many non-native English speakers and it is very difficult for them to read at times - and the same for us natives!
You need the BB data plan. What do I need a Data Plan for? - BlackBerryFAQ
Before you buy any used BB from any source read this. Buying a BB isn't as easy or like buying an ordinary cellphone or smartphone. Buying a BlackBerry off eBay - BlackBerryFAQ