The image contains raspbian and a compiled and working version of Armory. It has been optimized for working on the raspberry Pi model B so if you don't have this gadget yet you might want to consider buying the Hardware version.
And you're charging 30 euros for it? Do you even donate anything to the Armory developers?
We decided to offer an image because some people already owned a Raspberry Pi and rather wanted to apply the image to the SD on their own.
It is allowed because we have a license for it.
Mario
www.pi-wallet.com
CryptoCoins Consulting Ltd.