XML Expert Needed: Amazon, Sears, Newegg XML Feed

I sell products on three eCommerce platform: Amazon, Sears, and Newegg. They all offer the ability to do an XML feed to update inventory, process orders, and give order shipment confirmation. I have no knowledge what so ever on how to set-up an XML feed to these three platform. I need a XML Freelancer expert to have this set-up for me. Currently I have been doing it manually through Visual Basic Scripts in my Excel that process and exports out the correct format to feed these three platform. Moreover, I want to speed-up this daily process by having a central based that will automatically feed these three platform. Please write the word "xml" in the bid and message to inform me that you have completely read this entire project. I am looking for someone long-term as I will always be needing adjustments or new projects relating to XML. The person with the lowest bid, and most qualified will be awarded the job.