In terms of fundraising one of the disadvantages of selling the physical version of the book on Amazon is the small margin that it makes for the charity. With a £7.21 list price I receive £1.01 in royalties. That is the nature of print on demand.
I have recently set up my own website www.bowelcancerfundraising.co.uk where I will be selling my books, mugs and t-shirts to raise money for the Beating Bowel Cancer charity. I am now able to sell copies of Beating Bowel Cancer on this site thereby cutting out Amazon. I am able to buy a batch direct from CreateSpace at a discounted price and can sell them cheaper than Amazon and make more money for the charity. I can even sign copies if anyone really wants me to :)
The books are on sale for £7 including P&P and can be bought by going to the new website here. All proceeds go to the charity.