We can't have a summer incentive list without a summer car. Next up is the 2013 Ford Mustang. Whether you get this as a convertible or hard-top, you're sure to turn a few heads. Convertibles scream summer, and this American muscle car fits right in with the month of July. Stay patriotic throughout the month and cruise down the coast in a new Mustang. You know you want to. It can be yours for as little as $22,200, but if you use the incentive, you knock that price down to almost $20,000. That is doable on almost any budget. Make sure to finance through Ford Motor Credit Company before the end of the month with an APR of 4.0 percent and you could be driving that Mustang home.