Smokers with a pack-a-day habit spend more than $1,000 per year to get the nicotine fix they crave, and in many instances an e-cigarette habit is cheaper. First, e-cigarette devices, which come in a variety of shapes and sizes, come with an initial cost. A typical starter kit, which contains the e-cigarette device, a battery and several cartridges, can cost anywhere from $30 to $100, depending on the manufacturer, model and style. And then there's the cost of the cartridges. The cost of a year's worth of replacement cartridges for sustaining the equivalent of a pack-a-day habit will cost about $600 [source: Neporent]. To reduce those prices consumers also can purchase the liquid in bulk and refill the cartridges themselves.