One of the World's Smallest Scooter Bike: HONDA MOTOCOMPO - around US$800

The Honda Motocompo can transform by collapsing its handlebars into the seat. After that, it was small enough to be picked up by one person and fit snugly in the rear cargo area, with enough room left for a saxophone, a boombox, and all your tennis equipment. 

 
Of course, the City may not be very nimble all loaded down. As for the Motocompo, it had a 49cc two-stroke good for a top speed of about 30mph. Maybe Honda should sell the new Fit with a scooter — you know, since everyone's talking about gas prices and stuff. That was pricing for around US$800 in Japan!