Of course, you have to have access to multiple dealerships to use these "competitive" methods...
2014 Passat TDI SEL DSG (59k miles buyback)
2009 JSW TDI DSG (106k miles buyback)
2015 Nissan LeafS ($.02/mile fuel cost)
2014 Toyota Avalon Hybrid Limited (39.5mpg C/H)
2013 Ford CMax Hybrid (39.2mpg C/H)