This wagon sure looks clean. Wonder if the underside looks as good? Being from the rust belt I'd expect it to have some rust on it. Unless it's been garaged for a considerable period of time. It might have only 29k miles on the odometer (cars sold in Canada in the early '70s still had odometers in miles) but I would think it's more likely 129k miles. http://www.kijiji.ca/v-classic-cars/city-of-halifax/1972-dodge-colt-wagon/1036002917
Put one of these Side-by-side with a '72 Datsun 510 wagon, and you would be hard-pressed to tell them apart at 50 feet......