DiGi is offering RM999+RM500 (Advance payment, for new line and BIS Contract 24 month)... Or if you buying used set you need to check all this below:-
At the home screen of your Berry
press: alt + shift + h
this is what gonna appear

Your PIN will be shown, but If the PIN: Suspended, means u can't use BlackBerry Internet Service. Don't Buy it!!!
To Check Your Device Voice/Data Usage:
A Brand New item should not exceed the limit
Go to: Options > Status > Type: BUYR (for qwerty KeyPad)
Go to: Options > Status > Type: BUZR (for qwertz KeyPad)

Definitely Brand New Device

Not Brand New
If The usage not exceed, perhaps is just for testing purposes
To Check Your Device Locked or Unlocked:
Go to: Options > Advanced Options > SIM CARD > Type: MEPD

Device Locked by Provider

Device Fully Unlocked