Can you elaborate? From my (admittedly limited) reading, it looks like the major costs to import would be:
1) Cost to ferry the airplane to me, though I think this would apply to a Canadian registered aircraft as well. Something in the Pacific Northwest (Seattle/Portland for instance) would seem an easier feat than getting a plane over from say Ontario.
2) Import cost. From my reading, the cost for a new registration and the import fees shouldn't be more than about $2000-3000 and then maybe $2000 to have the new registration letters applied to airplane.
3) Taxes. My understanding is I would have to pay 5% GST at border crossing then 7% PST to BC if the plane comes from the US. However, sale of used aircraft is taxed at 12% PST by BC so the taxes seem to be a wash.
4) It sounds like there needs to be the equivalent of an annual inspection by a Canadian mechanic prior to issuing an Canadian airworthiness certificate, even if the plane is "in annual" following inspection by US mechanic. Presumably, major squawks would be dealt with in the negotiations during the pre-buy so hopefully no surprises however. I assume this inspection would also cost about $2-3000?
There is obviously the extra hassle of having to get new registration, extra inspections, and the time all of this will take. But from the cost side of things, I understand it may be something like a $6-8000 difference between buying a Canadian registered aircraft? Does that seem in the ballpark? If so, it seems like it may be worth the expense to significantly open up the options for available aircraft. Might save that much in a year of ownership if I could find a great plane in the US rather than having to choose from the much more limited Canadian supply (that often seem to be the older models with less avionics upgrades - you seem to have one of the unicorn MSE's in Canada).
Thanks again everyone, this is all extremely helpful info!