I need to clarify that I’m talking eBooks at the moment. The big thing to do is to give your eBooks away for free or for $.99. Those are very attractive, but many discerning readers fear they are also getting low quality books that way. They are drawn to books priced from $1.99 to $4.99 and are very willing to spend that for them.
Despite what many ‘experts’ say, there is no perfect price for your book. Some people have found great success pricing the first book in a series at less than a dollar and then getting easily two or three dollars for the subsequent books. Others don’t have success with lower priced books at all. Some only find success at the lower priced end. It depends on genre, style, season, and the reader.
It might be a good idea to put your books at the really low end at special times to introduce new books or series, but don’t leave them all at too low of prices or you might find you get adverse effects. I’ve seen way too many conversations and articles stating that readers will not purchase books below the $2 mark often for fear of quality issues. Keep that in mind as you price your book. Research before you price.
Are there experts in this field? Yes, but even they aren’t omniscient. Trends change and outside factors influence how a reader purchases books. They can’t foresee everything. LIsten to them. Try what they say. Then make your own decisions.