I did a direct-contact campaign several years ago to potential Canadian buyers. I spent about 3K all told. I concluded I'd be better off to wait for offers, assuming that some would at least know enough about domains to make a decent offer. Domain value should be general knowledge for people in...
I contacted a big company offering to sell guardian.ca. The word "guardian" is in their company name. The response offer was $200. LoL.
For a different one-word short .ca I got a high five-figure offer.