I can help you with that. Done it many times both directions. FYI the process seems to vary a bit so be prudent and stay in discussions with FAA and MDRA as far as what they require. Don't annoy them but stay engaged.
1. Airframe must have more than 100 hrs flying time
2. Buy it and import it into Canada. I use Pacific Custom Brokers - great to deal with. Pre-inspection etc up to you.
3. Fly it across border once Pacific paperwork is done. FYI if you don't have a US pilots licence you'll need someone else to be PIC
4. Pay GST
5. Get the previous owner to contact FAA and 'de-register' the aircraft in the US. Highly recommend doing all paperwork via overnight courier unless you want more delays.
6. FAA will send you a letter saying its de-registered. Now you can start the Canadian registration process
7. Apply for CofR. Once you get it contact MDRA and request an import inspection. Discuss with inspector what he needs from you specifically because I do find it varies a bit.
8. Once inspection done you'll get CofA in mail
When in doubt contact these guys:
http://www.md-ra.com/en/
Its takes a bit of time to re-register and register - expect at least a month but its not bad.
Enjoy!!!
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Steve "Stu"
Cold Lake, Alberta
7A #70015 - C-FZQX - built - sold
7A #71629 - C-FSIS - built - sold across Atlantic
7 #70215 - C-GOJU - flying - sold
7 #70703 - C-GMIY - flying - sold
6 #60119 - C-FHBZ - built - Airventure 2016 Bronze Lindy - sold
8 #82842 - C-FSBG - Fastback - built - sold
4 #2723 - building