So I had just bought from Amazon in July an M4 mini, brand new, for a lucky post-hike price of 832 CA$ (682 USD); it was the very last unit at that price and I snatched it the morning it listed on the Apple/Amazon.ca official vendor. So far I've been using it for a month and it's been great (switching back from a Windows desktop for a decade).

Today I entered this new M4 mini's serial as a trade in for the M6 base mini, and the retail price went from $1249 CAD to $824 "once trade-in received". That's the automatic estimate, so basically I'd be paying twice for an upgrade...