[quote name='Bilbo' timestamp='1332758241' post='1592512']
I would warn against them. They are cheap, an attractive trait obviously, but they are very small and lack credibility as professional instruments.
[/quote]
Well it depends.
When I was about 11 years old, my father found a Chamber Bass - effectively this was a half-size DB, intended for use in chamber music. No issues with credibility. Eventually we sold it when I outgrew it , and bought a 3/4 size bass which I still have.
Said 3/4 size bass is now in a gig-bag that I can comfortably carry on my back. At the time though, I mostly used public transport and carried the bass with me. Most buses and trains can cope with the size and a 3/4 bass isn't very heavy (certainly less than a lightweight 2x10 cabinet).
So although it's not impossible to find decent quality small basses, I'd challenge your assertion that a 3/4 is out of the question just because you don't have a car.