We are debating two different issues. You bought a US car and paid a US price. Sounds like you are very happy, great!

The OP wanted to know how much to sell his Canadian spec car for. It sells for more than the US sourced vehicle. You don't need to buy it for that price, but he is able to sell it for that price to somebody who wants it.

Interested whether your US sourced vehicle has a BMW Canada CPO warranty like the OP's vehicle?

no CPO warranty as it was not bought at a CDN
BMW dealer. you can get them to take off an allowance anyway if you don't want the warranty.

still have original warranty for now, after that i will be self insured

Depends on the VIN of your vehicle. If it starts W....then the car is considered German and will accrue a 2.71% import duty paid by the US buyer before the car can cross the border. This doesn't relieve or lessen the state tax paid to register the car.

If it starts with a number, then there is no duty.

Ask me how I know...

It is an X5, built in the US. How can it have a German prefix in the VIN?

Depends on % of parts/value from the US and from Germany/non-NAFTA countries

Even though my 2001 was finished and assembled in South Carolina, the x5 is 65% foreign-origin components so it got a VIN starting with a W. The US Customs saw the W and slapped the 2.71% duty without a word.

Thanks. Interesting history. I dug into it a little bit, and see references to 2001-2002 X5s being labelled with a W prefix by BMW. Their logic apparently was that the South Carolina plant was in a free-trade zone so it wasn't technically US soil. When they got caught they switched to the numerical prefix signifying US production. I don't think the content % changed after a few years, just that they got called on it. Maybe the content % did change, just not sure how they would do that, what components they would have switched over to US suppliers.

Edit: For the original poster - your 2004 shouldn't have these issues, but I think it is irrelevant since your car would be worth less in the US.

Too late to get a refund on duties paid? Similar to getting blood from a stone I would think....

Not a hope. The US government didn't get their money when the car was built, so when they got a second chance several years later they seized the day.