At only 60k miles, I should hope the rest of the car should last a number of years yet. However due to the low miles I would worry about regular maintenance repairs being far behind schedule. I have seen some low mile cars in poor shape because things like belts, seals, filters, etc just don't get replaced because the car isn't driven much.

Now those era of Sebrings, be it the coupes that were basically rebadged mitsubishis or the sedans that were all mopar, neither of those were very long lived cars at best IMO. If it was my car, I would look for a trans from a wrecker or guy parting a car and change it myself. I don't think I would spend more than 300 on a used transmission for one of these cars. There is no chance I would spend 2500 bucks on that car. But if it was a family member's car, I think I would keep out of it and mind my own business because I don't want to get roped into doing someone else's transmission swap!