The car has done a lot of miles with a brand new engine. Will this enable the car to run for a good few years?

I am looking at buying the above car and have seen a dealer who informs me that the car has brand new engine fitted and the fact it has done 220000 miles on it is irrelevant. He says the car should run for a good few years as has the new engine. It is a 2006 model. I am a little wary about this because of the mileage. Should I steer clear and look for something with less mileage or does a new engine automatically make the car as good as new with mileage being no problem? Thank you for your help.