I have no clue how much any of my bikes cost as that all goes through my accountant. The only bills I see are when I add upgrades like shocks etc.
one big thing is that parking is free for motorbikes in Toronto and in season we also have dedicated parking spots just for motorbikes. My guess is I park about 3 or so times a day and the savings alone probably pays for the cost of the Vespa. In general though Vespas are not expensive to own or maintain especially if you do not own a car and have that expense as well.