2004 Sebring Coupe with the 3.0 Mitsubishi engine. (6G72 engine) Any typical problem areas or components on these cars? Is the 3.0 a durable engine?

The reason for the question:

One of my relatives has this car. The transmission has died. The primary question is whether or not it is worth spending around $2500 to have a transmission installed. The car has just under 60,000 miles. (Book value on the car varies from $2700 to $4200, depending on which website is referenced.)