Retail price only tells part of the story. The cost per puff is what your customers actually feel in their wallets. A device that costs $10 but delivers 500 puffs is more economical than one at $8 with only 200 puffs—even if the sticker price is higher.

Use a cost calculator to compare. You'll often find that mid-range devices like the VERTEX-15K offer the best balance of price and performance, giving your customers value and you a healthy margin.