We're at the point of listing our house soon and actually have a chance of closing before moving (noting that we've already landed but aren't "residents for tax purposes") - in this case we don't need an appraisal, correct? Do you have any articles about that? I'm having a hard time finding much myself that actually applies to my situation. So far I've just found this:
https://taxmap.irs.gov/taxmap/pubs/p597-003.htm
Generally, gains from the sale of personal property by a U.S. resident having no permanent establishment in Canada are exempt from Canadian income tax. However, the exemption from Canadian tax does not apply to gains realized by U.S. residents on Canadian real property, and on personal property belonging to a permanent establishment in Canada.
That seems to support it not being an issue as long as we close at least one day before physically moving to Canada but I don't trust myself on these matters at all!