Script for Amazon Price check

IN PROGRESS
Bids
8
Avg Bid (USD)
$180
Project Budget (USD)
$30 - $250

Project Description:
I'm in competition with other sellers to sell the same product. Sample here, not actual product:
http://www.amazon.com/gp/offer-listing/B0000531GD/ref=dp_olp_new_mbc?ie=UTF8&condition=new
The first place is taken by a seller that offers best price (product price + shipping price).
I would like to be able to get email alerts when someone, other then me, get's to spot #1. The alert should tell me:

Product name
that seller's name.
Product price, shipping price and Total price
Difference between my Total Price and their new Total price.

This should work for my 30-40 products and any future ones. I would enter the link to the product and it's should be enough.
Not sure how ofter the page can be scanned for this, but I would like it to be as often as it can so that I know of any changes right away.

Let me know your proposals and ideas.

Skills required:
Amazon Web Services, Script Install, Software Architecture
About the employer:
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