Synchronize inventory in magento ebay and amazon

Avg Bid (USD)
Project Budget (USD)
$100 - $600

Project Description:
I am looking for someone to write a program that would use my magento store as the main inventory control,and would synch with 3rd party listings on amazon and eBay using mapping, I tried m2e and it worked great for eBay but not amazon. I really only care about having the inventory being updated with a cron job that i could set times for.

so if an order is made in eBay it updates both magento and amazon.and vica versa.

If i adjust the magento inventory i could hit a button and the mapped items will update (eBay, Amazon)

I just need something simple m2e would be perfect but it wont "revise" for amazon?

please only bid if you are familiar with this or have done something similar

also explain how you you would handle cancelled orders and how you would accomplish this project in your bid.

only serious programmers need apply!

Additional Project Description:
02/19/2013 at 20:47 MST
Thanks for all the enthusiasm I would like to see a small demo :
In the demo we use m2e and we change the qty in magento then i want to see that mapped item reflect in amazon qty. we could use any machine you wish if your interested let me know what you need to get started!!!

Skills required:
Amazon Web Services, eBay, eCommerce, Inventory Management, Magento
Qualifications required:
us_eng_1 US English - Level 1
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