Why Don't We Show the Price?
Manufacturers sometimes ask that retailers not display a price if it drops below a certain amount. The "click here to see price" message indicates that the price of the item is so low that the manufacturer requested that it not be advertised (that is, displayed). In a brick-and-mortar store, you would probably have to ask a salesperson what the price of the product is. At Amazon, by clicking on "click here to see price" you are essentially asking to see the price, at which point we show it to you.
Ummm... WTF? If I didn't see a price in a brick-and-mortar store, I wouldn't buy the item! You forcing me to click just to replicate that have-to-ask experience is forcing me to replicate my wouldn't-buy-the-item reaction. I hope you're happy about your lost sale.