How to block messages (from other than buyer) on completed item?

[mistereusticehaney]

I am getting a flurry of messages from non-buyers about a completed item. As the item is complete, it is very annoying / frustrating.  Some have suggested that I cancel the completed deal, relist with Buy it Now.  I am not doing that - a deal is a deal, and my word is good. 

How to block messages (from other than buyer) on a completed item?

[inceptions]

@mistereusticehaney 

You can ignore the messages, but I would simply reply, "Thank you for your interest, but this item has already been sold." Type that somewhere, and copy and paste it as your response. It only takes a few seconds...

You are in control of what you allow to frustrate or annoy you. Focus on important things instead of minor annoyances.

There is no communication block that includes everyone except the buyer.