Best line of defense is to avoid getting screwed over by being as diligent as possible. Still, it happens... Shoot me a message if you ever have questions about a purchase. Happy to help. (Note: I have never bought a .ca, so you might know better than me in that regard) Keeping this post on topic... If somebody were to ever get screwed over on buying a domain or selling a domain from an Efty marketplace, how much assistance can Efty staff offer?