"The buyer also redirected it from the home address on the order to a Parcel Locker"

"I will be closing my eBay account if it's this easy to be scammed"

So to clarify, you posted it to the home address provided through ebay  and the buyer had it redirected to a parcel locker  while it was in transit.

This sounds very much like like a planned scam and yes, it is that easy to be scammed  on this site.