Buick has many solid offerings under $5000, but the best may just be the Buick Lucerne. Like all of the cars under $5000 on our list, the Lucerne has a reputation for durability and value. Your 5K will get you a strong 4.6L V8 capable of 275 hp and 295 lb-ft of torque. Surprisingly, such a large engine is able to achieve 23 mpg on the highway.