Transporting to and fron Canada?

I'm Canadian. I almost purchased a car in Michigan. It's not that big of a deal. Most of the onus is on the purchaser. This link has good info http://www.canadiandriver.com/articles/mj/import.htm . U.S customs requires the vehicle information is faxed to them about 72 hours in advance of bringing the vehicle to Canada.

Basically, you just need to give the purchaser info required for U.S. customs.
Bought two cars from the us last year. You are actually required to leave them with us customs for 72 hours for exporting and then import into canada. I did not export them as canada customs does not require you to export but if I take the cars back to the us and the us customs checks and finds that these cars were not exported you could possibly have to pay the export fee at that time.