I don't think the car is worth enough to invest in either a new or rebuilt engine. Neither option would really increase the value of a car with that many miles very much. It can't realistically be worth more than $12,000 to $15,000 at those miles even with an operating engine. A used engine is the only viable option, but even that would be a chunk of change relative to the car's value. If it were me, I think I'd honestly sell the car as is and move on with my life.
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