There are all kinds of potential variables. Price gouging on Kodak's end is probably not one of them. One elephant in the room is the fact the ran completely out of 35mm canisters for nearly a year, and needed to find and new source, and also probably had to undertake a significant new machine investment over the switch.
Also, amateur label films tend to be stored and distributed quite differently from professional ones, and are not held to the same tight standards of performance at time of purchase. That's always been the case. Who knows where or when that Vision 3 product was packaged, or what distribution channel was involved.
Linking an $82.95 price for a 5pk of E100 120 film is hardly a fair comparison to a single roll 35mm price. B&H's prices are often the lowest when they have abundant fresh inventory, but then they drastically raise it when they are running out, until they get in another big order. That happens with printing paper too, not just film. Maybe it's so they'll at least have something on hand for sake of their dedicated pro customers. I don't know. But it's been their policy for a long time. But still, you're comparing apples with oranges.