Well, the Hickory Farms 'stand' shows up every Christmas and the week after.
There're 3 kinds of SF (maltitol) candies, boxed, in the catalog, average 24.99 reg price/454g (5.5 cents/gram) before shipping & taxes. 1 kind ("truffles") at the stand, 19.99/454g (4.4 cents/gram) and right there for pickup. Probably an incentive price for the Christmas shopping because they're the same ones as in the catalog.
I suspect that if they sold more of the SF, they'd probably carry more. Maybe Victoria's high percentage of older and therefore presumably diabetic folk accounts for the presence of the SF truffles?
Purdy's also carries a short line ("truffles") of SF (maltitol), boxed, regularly. At Christmas, SF Milk Chocolate bars 35g/$3.25 (expensive at 9.3 cents/gram) and SF Milk Choc Santa-on-a-stick (didn't get the price, but not cheap).

No SF Dark Choc. Compare to Ross/Deelight choc bars at $1.50/35 grams (usually), or about 4.3 cents/gram.
This chocolate habit is expensive altogether, isn't it? I've been making chocolate dipping stuff (one of my experiments) out of pure cocoa butter ($15/454g) and dark euro cocoa (~ $7/500g), retail prices, so I guess it's expensive no matter how you cut it.