Super Summer Special on Handlebar Cable Locks for Vespa GTS, GTV, GT 200, Sei Giorni.
Now only $59.97.
This is the same lock you can get from the Vespa dealer for a slight bit more, but without the word Vespa on the sticker.
Very easy to install and operate, and an effective deterrent to unexpected borrowing of your scooter. You don't have to get down and dirty to operate it either, so you will look better while keeping your Vespa safe.