Hi Chris,
In Canada, the insignia of the Order of Canada may be purchased on the market via the estate of a deceased member. However, stolen insignia and "insignia sold by the recipient" will be confiscated and returned to the Crown (the government).
The stolen reason is obvious, but imagine that a recipient can't sell his own insignia.....in this case, it's similar to the Medal of Honor in the States. I own a Medal of Honor and can sell it to anyone outside of the U.S., but an American recipient of the MOH may not sell, barter, trade, or export his award. He may bequeath, or give it as a gift.
Cheers,
Bill