The BMW C1 (125cc engine) and later the C1-200 (176cc engine) are built and sold in Europe. It's roof is fixed as the entire thing is built on a safety roll cage. The Benelli Adiva is an Italian designed retractable roof scooter that is similar in style to the BMW C1, but lacks the safety elements of a roll cage. Both the Benelli and the BMW were originally designed around the same time and are popular commuter scooters in Europe.
Benelli licensed LS MotorSports in the U.S. to import a Taiwanese clone of the Adiva called the Diamo Velux. The Velux has a 12 month parts, 90 day labor warranty, comes with ABS Disc Brakes and a CD/MP3 Player/Radio standard for about $4,000. An option appears to be to add an LCD screen and DVD/GPS/Rear View Camera unit.
The Tank Courier 150 is a Chinese made look-a-like of the Velux, as is the Baron Motorcycles 150-BAS. As already mentioned, Tank's version also sells for about $4,000, but only comes with a six month warranty on just the engine and drive train. The Baron is the big bargain as it sells for around $3,000 and comes with a one year/3000 mile warranty, but doesn't include a radio unit standard.
Me, I'll stick with my Suzuki Burgman and a rain suit, thank you very much.