Worst: 2001 GMC Jimmy 4x4 purchased in 2012.
62,000 mi paid $5600 and had over $4000 in repairs, excluding tires, brakes, oil changes in about the year that I owned it. Most repairs were done by myself so most of this cost were for parts not garage labor. Something would break or fail on this vehicle on almost a weekly basis, talk about a hanger queen.

Best: 1999 Ford Explorer 4x4 purchased in 2002.
44,000 mi paid $8900.00, sold it in 2011 had 150,000 mi. New owner drove it for another 45,000 mi before sending it to the bone yard earlier this year. The vehicle was still very sound mechanically but the body was just totally rusted out. Total repair cost on this vehicle, excluding tires, oil changes and brakes was about $2500 when I owned it. Again most repairs done by myself.