[jyl]

That is a good price for the VBB - but you better take it to a scooter shop that knows vintage Vespas and make sure it is not a Vietbodge - a scooter that was cheaply and poorly "restored" in Vietnam and sold to a sucker in the US. The "new" motor might be a real Vespa motor, or might be a LML (Indian-made) motor, nothing wrong w/ the latter but raises suspicions, normally you wouldn't stick an LML motor in a VBB that you also took the time to strip to bare metal (like sticking a 914 motor in a concours 356 restoration). If he has documentation showing it was restored here then buy it. If it is a Vietbodge, avoid as the next buyer certainly will.

I think that is an okay price for the PX150, not really sure there.

There are some vintage scooter shops in SF, ask there. Also spend some time on StellaSpeed forum.

Finally, check out the new four-stroke Stella, if they are available in California. No mixing oil, quieter, more torque, lower emissions, "should be" more reliable, the purists will sneer but there's plenty of advantages to a four-stroke. Plus disc brake, electric start, manual shift, steel body, mostly a clone of the PX body.

I have a 1979 P125X, kitted to 150cc, Sito+, various mods - nice way to get around town, though hardly "fast". An idiot in a car will kill you just as dead on a cute Vespa as on a bad-boy sportbike, though.