The last Buick to make its way on our list this month is the Buick Regal with an incentive offer of $1,000. For a car already priced under $30,000, that's not bad. Although fuel economy isn't as great as it is on the LaCrosse, it will still get you where you need to go; it just may cost you a few extra dollars. Buick has spiced up this vehicle to make it more fun to drive, as it gains a sportier feel and better performance. To snag this incentive deal, make sure you finance through Ally Financial Inc. and have an APR of 3 percent or higher. Try any lower and they'll send you away and you can forget about that extra grand in your pocket.