Hello Everyone! I am new to MobileRead, and a newly self-published author. I won't bore you with book plugging

QUESTION: HOW MUCH DO I CHARGE FOR MY NOVEL?
- Does length have some bearing on price? My novel is 320 pages
- Should I sell it cheap just to get the word out and build a fan base?
- How can you make any money selling it for .99?
- What is too much to pay for an e-book? I've read reviews that think 9.99 is too much and 1.99 is too little. (I don't want to sell myself short -It is not physically published - just ebook)
- I'm on Amazon, smashwords, and Barnes and Noble - is there some formula that I am missing? I see books at all different prices!
- Amazon claims to start promoting right away, do they do a good job? how long does it take to get selling?
Thanks for all your help!! I really appreciate it!
by the way....I initially priced it mistakenly at $9.99 (a little too ambitious I think)and I am planning on changing price today