I owned a Vespa GTS 125 from new and sold it a few weeks back, a month before it would be 2 years old. Here are some questions I think you need to as yourself, and I will give you my brutally honest opinion
- Sure tax is cheap, but have you got an idea of insurance costs for it? Mine was £330 TPFT insured to commute and kept ina secure parking space both ends, for 4000 miles a year. Thats 10% of the bikes value!
- Fuel is cheap (cost me approx £10 a fortnight to fill up, did on average 70mpg), I think you could get better economy on other bikes....
- Do you really want a twist and go? I "only" had a CBT license, but whilst the automatic nature is very easy and convenient for town, and helps the "cool" and easy package, I think you will find, especially for commuting, it will place a lot of strain on the parts which leads me to....
- Service costs. And for me this is where I drew the line. Do you have an idea of service costs?
If not, then budget for this. To keep it properly maintained as per handbook you need a service every 2000km (or year). Cost of parts per service is £20 - £75, no big deal. But labour is a different kettle of fish. I had mine done at the main dealer I bought it from. Which charged £75 p/h plus VAT! And each service would take 2 or 3 hours, so for my commuting habits, I needed approx 3 services a year, which would cost an average of £300 all in... call it £1000 for a year, and my commute was almost 20km round trip each day...
Sorry to put a downer on it but the running costs outweighed the immense fun I had on it. The problem is, with commuting you are often going full throttle then brake, full throttle, then brake, all the time between lights and traffic etc. And I simply dont think Vespa's are built for such stop start driving.
If you are hell bent on getting one and you want my opinion, forget a GTS or any newer bike that might command a premium and get a 2002-2003 plate GT and look for one in as good condition you can find, with as lower mileage as possible. Ive heard the engines are usually only good for up to 30,000 km. With a cheaper bike you wont mind getting it dinged or scratched if you park in public (I kept mine mint by paying to park securely at work, but just adds to the cost). Afterall you could pay for a respray for what secure parking costs for 3 months. Also you wont be held to getting it serviced at a main dealer to hold value, if you can find a quality independent, use them, Im sure it'll be better and cheaper. Also, with an older bike insurance might be a little more reasonable.
I wanted a Vespa for the looks, but if I were doing it again, Id buy myself a cheap, reliable (read Japanese) manual bike. More reliable, more economic, cheaper to insure and service and better suited to commuting. I guess sadly, commuting requires substance over style. I'd take a manual PX Vespa over an automatic if I had to have a Vespa. If you do get one, invest in a flyscreen (half or full height), they really do make a difference!
For the record I bought a bike to commute to work on, and it takes 5 mins longer to get from SW London to Canary Wharf where I work! Such is the effect that traffic lights have.