If you want to ship and register the car in Canada you will have to have the car converted..
For example, the odometer and instrument cluster will have to read primarily kilometers. There may be some other changes as well. Is the car right hand drive. If so, that will be a problem as well. BTW, from an earlier post, the U.K. vehicles are in miles.

Its not worth the effort or the risk. This whole thing sounds fishy and he doesn't seem to want to cooperate with you. Look around for a good resale in Canada if you don't want to pay new car price.