I am not sure of quality cars. you always have to do your due diligence. always ask for receipts on work. having said that I use cars.com and pick the zipcode for an area. the further down in the US the better and sunny states like FL, AZ, CA NV cars will not be damaged by road salt, etc.

from the pricing on cars.com you can either go get the car yourself or use that price to approximate what is will be for getting a broker to bring the car in for you. x5's are made in the US so no duty on them. exchange rate may be your biggest cost and you will have to pay GST on the exchanged price once you get it to the border.