So there are 2 8 series BMW's for sale on Autotrader Canada I will post a link to the nicer of the two which seems to be a very clean car with fairly low mileage.
https://www.autotrader.ca/ico/bmw/8%...%201J0&sprx=-1
There are about 18 964's I am attaching one of the cheaper ones with similar milage and it seems to be in similar condition. The Porsche seems to be holding it's value better but there are so many factors to consider. I'm not disparaging either car or their values BTW.
https://www.autotrader.ca/a/porsche/...L0S1J0&sprx=-1