I would ask the owner about the maintenance history of the car. Generally, a car with proper maintenance will last a long time. However, being that it's an Acura/Honda, at 150k there's still quite a bit of life left. Of course that's assuming it's been taken cared of (fluids changed regularly, brakes, clean, etc...). Best way to find out is to see it for yourself. Drive it, listen to any weird sounds, and don't be afraid to ask any questions. Also, if you don't know what to look for, take a buddy that knows a few things.With 150k, the exterior wont be perfect. Expect that much.