Downloading the image is actually the cheapest way; the prepared SD cards cost more, with the N2A ranging from $29.99 to $59.99 for the HD+ depending on the size of the card you want, while the "Root My Nook HD+" costs from $25 to $55. The download price for the N2A is the same if you're putting it on an 8GB, 16GB or 32GB card of your own.
