Spend them on your next trip to Canada or sell them to someone who will be travelling there. Most agencies like American Express or Deak prefer not to exchange coins because they're more difficult to...
Any silver coin having its value primarily from the silver it contains is considered to be a bullion coin and as such many of them have "silver bullion" on them.
Unit, Corp, God, Country Respect and Protect your unit, Respect and Protect the Corp, Respect and Protect God, Respect and Protect your country, These are without question