Returned 'For Sale' item due to fault.

[Chequered Flag Racing]

Just had a motor returned that I sold in good faith in known working condition. I asked the buyer for pictures from his end to see if it was in a different condition to that sent and it looked fine in his pictures so had the motor returned to me so I could check it out. Although I ran it up first on a motor checker I didn't take a video before posting. I have now done a video once I received the motor back and it's working fine. Just need to sort out with the buyer to return the motor to him and not issue a refund as he requested.

So in all the electric items I sell I will post a video to show items working and therefore added the following text to the electric items I have for sale now and in the future.

All electrical items will be shown to be working via a video before posting.
Therefore no refunds will be issued once it has been dispatched

Do you think that's fair?

Here's one I uploaded on 3rd Dec 2014 testing a receiver before selling.
https://www.youtube.com/watch?v=4iJ2NIGr7l0