You still need the dongle to run a 'borrowed' copy.
You must mean you are running a cracked copy?
Anyhow, make sure any version you purchase comes with this small blue usb dongle key. Again, make SURE it comes with it because some people sell on thier as 'Cubase SX with software dongle EMU' and shit like that, which basically means its the cracked version.
Ask for a photo of the usb dongle key if they dont have one listed on the auction.
Any auction that seems to good to be true or to cheap will more than likely be a cracked version for sale.
ten