The car has burned oil and smoked since the day I bought it. This is common to Diamantes of this body style.
The power antenna broke at 140,00 miles.
I replaced the stop light switch when I bought the car (The brake lights did not work).
The electrical devices act up sometimes, such as the radio occasionally turning off while a window is being rolled up.
Nice car for the money, but choose carefully and be ready to handle to the maintenance that comes along with it, and the likelihood that it will start to smoke some time after 100K. Comfortable and amply quick, a nice road car, but not too great on gas, and it doesn't improve much on the highway. Expensive looking interior, and most interior parts have held up very well.
I think it just all depends on the Diamante. I bought my Diamante with 121k, when I sold it it had 162k without ever having putting any money into it other than regular maintenance (tires, oil, brakes)