For two people:
Past cars:
1988 Chevy Sprint, bought in April 2012 for $1000 with 46,000 miles. Crashed in June 2013 with 69,000 on the odometer. :(
1996 Volvo 850 wagon, bought in July 2013 for $2000 with 155,000 miles. Sold in April 2014 at 168,000 to buy:
Current cars:
1999 Chevy Metro, bought in April 2014 for $1000 with 146,000 miles. Currently at 162,xxx.
1992 Buick Roadmaster wagon, bought in July 2014 for $700 with 157,000 miles. Currently at 163,xxx (I think).
The '88 Sprint was wonderful, and crashing it sucked pretty hard. The Volvo was super nice, but it was too thirsty for driving around town, and too small for big roadtrips with multiple dog crates. The Metro is nice for in-town driving, shorter roadtrips, or roadtrips with less cargo. The Roadmaster is a gigantic beast of a landyacht, perfect for long roadtrips with up to 4 dog crates set up in the back. Or 6 passengers.
Both current cars I view as quite Mustachian. No depreciation costs of any significance, the Metro is efficient, both are super easy to work on (and I do, myself), and the 20MPG Buick is driven with purpose, not moseying around town for no reason.
EDIT: All were bought with cash upfront. I think I would have a nervous breakdown if I had a car payment. Couldn't do it.