For the past couple of years, Buick has been very aggressive in promoting short-term low-mileage leasing. The plan was to get people in the door to experience the new Buick. Once they realized Buicks are now sleek and full of Euro Chic, people might want to buy one. It's debatable if that plan worked, but one thing is for sure: There's a massive amount of low-mileage Buick Regals out there.
The price of Regals is all over the map due to lease returns and dealers aggressively discounting 2015 models to get rid of them. But at the $17,500–20,000 range there are a good number of 2013 to 2015 Regals with under 15k miles for sale. The Regal might come with 2.0L Turbo or 2.4L Hybrid. The Hybrid is a bit slow; stick with the Turbo and drive with the traction control off. They all come moderately equipped with leather, heated seats, alloy wheels, and dual-zone climate control.
If you have a little more cash to spend, go for the 2012/2013 Regal GS, which is based on the Opel Insignia OPC. The Regal GS comes with 270 horsepower and 295 lb-ft from a turbo engine and a HiPerStrut suspension to reduce torque steer. They all come standard with Brembo brakes, navigation, sunroof, and premium sound system, in automatic or manual. Just make sure you budget money in your savings to replace the front tires. Trust me on this.
You can purchase a Camry or Accord with some equipment for under $20,000 with a bit more miles and years than the Regal. But ultimately the Regal feels more premium, drives better, and is less boring. Make the right choice and buy something unique.