What price an ebook?

Like I guess any new author I have had to decide what is the best price to sell my new book. I did a little research and the views on the subject seem widely different. There are many who say give it away for nothing to build awareness and others seem to sell at a price that is much less than a cup of coffee! Having taken some months and a huge amount of effort to finish my book I have to say I attach more value to it than a latte. Personally I don't see the point of free books when a reader can preview 20% of the book and then hopefully you wet their appetite and they buy the book. There is a stronger argument for someone with a series of books enticing someone to try the first for nothing in the hope they will then buy others in the series. You do need to build public awareness of your new book but it is my view there are better ways than just giving your book away. For example perhaps a short discounted sale period to mark the launch. I believe if someone pays something for your book, even a small amount, they are more likely to value what they have bought and actually take the time to read the book and then provide a review. It is an interesting subject for debate!