I would imagine you are well aware of the taxes when the car is imported into Canada.
Consider checking out if the warranty will be honored. Folks from the USA and Canada buying snowmobiles from the other country using their home country's address have run into issues. I was recently told by a Canadian dealer that if the buyer does not have a home address from the country they wish to buy the snowmobile, the dealers are being told by the manufacturers they can not sell it. (However, if the buyer buys from their home country, the manufactures will honor the warranty in both countries.)
Years back I bought a new USA built boat from a dealer in Canada. I included a clause that final payment would be made once the boat was delivered to me in the USA. I let the dealer carry the burden of the border crossing. It can be a hassle. Even little technicalities like the US Coast Guard documentation process not recognizing a Canadian notary. (Yep, the dealer had to re-do the title documents, including a replacement Manufacturer's Statement of Origin, drive across the border, get it notarized, and re-submit to the USA Coast Guard.) The whole process took about 2 months!