Trigger Changes in MySQL When Item Sels on eBay with IPN
Hi, I've read that it's possible to trigger changes on my website once item sels on my ebay account. I want to create system that would manage inventory automatically, both, on my own website and ebay. If items sells in one place then system closes listing in another place. I know I can use paypal IPN to close listing on ebay if it sells on my website... But how to trigger IPN if item sels on ebay? Is there something that I have to configure in my paypal account?