Finding item info from Amazon based on its sales rank system

Avg Bid (USD)
Project Budget (USD)
$250 - $750

Project Description:
Hi all,
I need a program that finds the MOST UP TO DATE item information in based on its sales rank system (so every time when I run the program, it generates the newest info).

First half of this project:
Books category: Books from #1 to #10 MILLION sales rank (needed Rank #, ISBN, Book name, Author and Binding). Again it’s #1 to #10 Million sales rank on books, not Kindle books.

Second half of this project:
Movie, music, game, DVD, VHS, etc. categories: #1 to #1 MILLION sales rank (needed Rank #, ASIN, Item category, Item name and author if it states in Amazon)
All other categories: from #1 to around #100 sales rank (needed Rank #, ASIN, Item category, Item name, and item weight if it states in Amazon)

Other information:
-Program run time should be less than a month.
-Program can be run from a list of proxies.
-Output in tab-delimited format in batches.
-Preferably written in Python 2.3 which I have access to the source code.
-Please let me know two things:
1) Your approach on how to get the first half of this project done (VERY IMPORTANT)
2) Supports/guarantees that I will get when the program has bugs or fails to work in the future.

If there is anything not clear, please let me know.
Best regards,

Skills required:
Data Mining, Python, Web Scraping
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