From https://pages.ebay.com.au/authenticity-guarantee-sneakers/: Why
can't I message the buyer after I sell my shoes?Messaging capability is
turned off once the buyer completes payment at checkout. Your buyer will
receive all tracking information and...
Completely agree with Ebay needing to communicate this process better to
buyers! I've now had a buyer check the tracking info and saw it was
being sent to a Sydney address, so they tried to message me (which is of
course disabled after purchase), the...