I have a 2005 Prius with 250k miles and a 2016 Prius. They have been some of the best cars I've owned and I've never owned a car that long. I've only replaced the battery in the 2005 a few months ago. No other problems other than a few recalls and a rattle in the C pillar of my 2016 fixed under warranty. Such amazing cars.
I agree with colin42, get one with less than 200k miles, preferably an already replaced hybrid battery and 2010 was a major redesign. colin42 got an amazing deal, so don't expect that low price, maybe around $10k. That's probably the only thing that will go wrong with the car aside from burning oil, $2000-2500 fix once every 150k-250k miles.
The Chevy Volt really hasn't had consistent reliability as only the 2015 and 2013 had good ratings on Consumer Reports. Then there are the problems of being a 4 seater and it needs premium fuel. It would be my choice for a PHEV except for the Prius Prime. The Prius has had 5/5 perfect reliability scores every year except for 2001 and 2006 where it got 4/5. Also, the Prius has had excellent consumer satisfaction scores across the board, which is rare for their used car satisfaction rating system (I've never seen that high satisfaction on CR). This is true information, but I may be biased since I own two of them.
The Mazda3 is a great car; 2014 was a major redesign. It isn't the most comfortable compact car, but it is fun to drive. To make it lighter they take out sound deadening and as a result there is a lot of road noise. I'm not a fan of the Malibu or especially the Focus. Boring cheap tinny rental cars. The upside is a huge depreciation hit. Only the 2007-2011 Focuses or Foci were reliable-ish. That generation Malibu was mostly reliable except for a decent amount of transmission failures.