What is the value of a 1867-1878 Canadian coin with John A. Macdonald on one side and House of Commons on the other?

It isn't a coin, it's a medallion issued by Shell Oil. It is part of a set issued between 1967 and 1970. It was not legal currency and wasn't issued by the Canadian Mint.

If you can find a collector of the medallions it's worth anywhere from .50c to a couple of dollars at most. It depends on what condition it's in.