Here is the information you need to get you started.
When someone orders from ebay and has paid I would like the information to be added to my xcart database, I would want this to include firstname, lastname, company, telephone, address, county, country, post code, match the ebay product with my website product somehow, quantity, price, shipping cost, taxes, shipping method, paypal method and paypal validation code and any other information i've missed.
I would like this information presented in a webpage within my site where I can manually modify any information and then submit the order. I have a order modification script already if this helps.
This is how to achieve this from the xcart support team:
"X-Cart uses func_place_order functions in order to insert an order into x-cart.
So you can find required SQL queries in code of the func_place_order function include/[url removed, login to view] file.
I hope this sounds easy enough and look forward to working with you.