I have been trying to figure out how Amazon treats pre-orders for Kindle books so I spent about 20 mins on the phone with them and thought some of you may benefit those who care
Monday: We pre-order Book A today for $10
Tuesday: The price for Book A drops to $8.00
Wednesday: Book A now cost $4.00
Thursday: Book A is now $6
Friday: Book A now cost $25.00
If the book is released on:
Tuedsay, you pay $8
Wednesday, you pay $4
Thursday, you pay $6
Friday, you pay $10
Basically the prices that matter are the one at which you pre-ordered at and the release day price. You get the lower of the two.
If you want to take advantage of anything other than those two, you need to cancel and re-purchase the book (pre-order) at the lower price.
So lets say you see the $4 price Wednesday you can cancel and pre-order again Wednesday and now you have locked in the $4 pre-order price and the book can go up to $1,000,000,000 and you still only pay $4.
I hope this is useful to some. I re-did most of my pre-orders and I think I have "saved" about $30... Yes, I have a ton of book on pre-order
EDIT: Ok, so maybe $1,000,000,000 is a little excessive