Hi,
Greetings! My name is Ashish and I have good experience with Amazon APIs to download orders, update inventory, update tracking info for Amazon merchants / resellers. I have done this for the latest MWS - Marketplace APIs using .Net, c#.
I can easily build you an windows app which will download orders from Amazon and store to your local database and you can enter the tracking info which will be updated back to Amazon.
I did not quite understand what you want to do with ebay so please open up a chat converstation so we can discuss the details. I have done ebay integration also so no problems there.
i understand that its not necessary that you should award me this project but I would love to just chat withyou and introduce my services to you. I have lived and worked in the USA in past and like to talk with American people.
Looking forward to your reply.
Thanks,
Ashish.