Track 2.5 28000 mi. Truck was wrecked but rebuilt. Did set for a long time. ?

Any engine that has sat for that amount of time may need to have various seals and gaskets replaced. They can dry up over time and cause leaks. Are you going to be able to have an inspection prior to purchase? I highly recommend that and don't pay too much because it has low miles. For this type of vehicle especially considering it was wrecked, low mileage doesn't mean much. Alex