I'm considering buying a used 2009 Prius Hybrid 1.5P H5 ECVT (with 59k on the clock), however am wondering whether the fact that we only use a car 1-2x per week to run around town will be an issue. (Town in Wellington, New Zealand - very hilly.) Also, how much difference is there between the 2009 and 2010 models? Are both of the same generation? Is it worth me waiting a year until the 2010 models are available as used cars? Any advice?