1. Phoenix, Ariz. Median price: $241,700 Price change: -7.8 percent 2. Miami, Fla. Median price: $345,900 Price change: -5.7 percent 3. Denver, Colo. Median price: $230,100 Price change: -6.3 percent 4. Tampa, Fl. Median price: $201,600 Price change: -12.2 percent 5. San Diego, Calif. Median price: $522,900 Price change: -9.8 percent 6. Chicago, Ill. Median…