Market size reports for vape products come in three tiers: free (government trade data, industry newsletters), mid-tier (paid reports from $500 to $5,000), and premium (analyst subscriptions that can run five figures). For most distributors, the mid-tier is the sweet spot—it gives you regional and category detail without the cost of a full analyst relationship. Free data is fine for macro trends, and premium is only worth it if you're making million-dollar inventory decisions based on proprietary survey data.