I think the privy-marked SMLs are an interesting additional collectible for those that collect Canada's standard/bullion SMLs, in similar fashion as the various colourized and gold-plated versions that the
RCM has made available over the years. Of course, they are also a neat collectible on their own and now number about 40 different types!
I purposely mentioned the colourized and gold-plated SMLs because, like those, I don't think the privy-marked series should be equated to the standard bullion issues. They are custom coins, struck by the
RCM for organizations that wish to offer collectors something different. Naturally, they need to be priced a bit higher than the straight bullion pieces because they involve more engraving time and die work at the
RCM -- along with separate production runs -- which needs to be paid for by the organization/corporation that contracts for the special privy-marked coins on top of their bullion cost.
It seems a bit silly to complain about their cost being a few dollars more than the bullion pieces as they are not meant to be bullion coins -- they are specially struck collector coins and have a justifiably different cost structure. If your interest is in acquiring silver bullion, stick with the standard SMLs. If you are interested in collector-oriented silver coins, then the privy-marked SMLs are one of many viable options that come at an advance over their bullion value.
Full Disclosure: I have collected the privy-marked SMLs since their inception in 1998 and have never considered them bullion pieces. I've never had any of them graded/encapsulated and don't worry about whether they're 65's, 67's or 69's -- paying to have these particular coins graded just doesn't seem to be worth it. I have purchased a Titanic and Dragon from
APMEX to keep my privy mark set current.