If I just sold an item on eBay, then push an IF notification.
This recipe will be triggered when you receive an email from eBay with the subject "Your eBay item sold!" If you have a filter on your Gmail to send these emails to the trash can automatically, since they get quite annoying, then add this to the search term: "in:trash". Make sure there is a space between the subject search and your folder search term (in:trash in this case). The notification will contain the subject of the email.