I bought these the last time they were on sale like this, and may have audibly gasped when I saw they were on special again.
Amazon has their Dove 18-pack of 100-calorie milk chocolate bars currently on sale for $4.50 (free shipping with Prime). Even better, you can opt to order via Subscribe & Save and save another 5% (but, more importantly, it can help get your monthly total up for better savings on other items). They won’t ship until they’re back in stock, but at that price, who cares? I love having a small candy bar option around when only chocolate will do.