If you want something reliable we'd suggest sticking to one of the Japanese makes. In terms of small cars you can go for something like a Toyota Yaris, Honda Jazz or a Nissan Micra. All are good value for money and there's plenty of choice for your budget. Our favourite would be the Yaris as it's incredibly reliable and well-built. We know people who have had models for 10 years with no problems, breakdowns or faults whatsoever.