Best way to track prices of stores
 

I need to track stores prices of items, for example of amazon for this book: http://www.amazon.com/gp/product/074...pf_rd_i=283155

It is 13.99 but say it drops to 7.99 tomorrow.
So my website would display
01/29/2010 - 13.99
*price change* - 03/03/2010 - 7.99

If there is a change of price and I want to display that on my website automatically, what is the best way of doing it?

1)Through the source code and scanning that every day?
2)Through a product database the shop may have that I can pull more easily?
3)Any other way?

I would like to hear your ideas.

You'd have to look at the source code of a page on the amazon website. Probably there are several different pages that show price lists.

Could you point me to an example of a page that shows a price list?

i guess not...

duh :1orglaugh