These things were quite the white elephant of the Canadian coin world. There was all kinds of hoopla when they first came out, and a lot of people subscribed to the plan to get the whole set, thinking they would do nothing but increase in value.
Unfortunately, they were totally overproduced, and most people who bought into them weren't coin collectors. They started to trickle back into the marketplace because the dramatic increases in value never occurred, but no one wanted them, and banks wouldn't even take them at face, because it was such a big hassle to send them back to the Mint.
Today, they are worth little more than bullion value, and still, no one really wants them.