No doubt, NECCO makes the best candies (other than the high quality lines at Sees, etc). Unfortunately, they can be hard to find since Hershey & Mars tend to monopolize all the candy selection at Grocers, drug stores, etc.
My favorites include Mary Janes, Squirrel Nut caramels (not so much the zippers), their chocolate wafers (single & mixed chocolate four packs), especially their coconut Clarks bars (not so much their regular Clarks, although they are OK) and an occasional Sky Bar.
I tend to find them at the discount department stores (Dollar Stores, Five Below, Benny’s, etc) and some candy stores that carry the so-called “penny” or loose candies.
I agree – Necco is single-handedly keeping some of the classic candies alive. Their only failure I have found so far are the 4 limited edition flavors in “Mary Jane Wicked Mix” (Peanut Butter & Jelly, Peanut Butter & Banana, Smores and Peanut Butter & Vanilla) that comes out at Halloween. They were dreadful. I love the Clark Bar Wicked Mix, though (3 flavors, classic milk chocolate, dark chocolate and coconut).