I sold something on Ebay. The item was brand new and unopened.

This is the message from the buyer through Ebay:
I have received the item; however, I do not think it can be described as new. The original packaging is very marked and while that is not a problem in itself, there is evidence of probes having been placed into the terminals and the right hand terminal is much lower than the other, as if it had been pushed into the unit; it also appears to be damaged?

To save the hassle I have accepted the return. No way was it damaged (It is a clear wrapper so I would have known straight away). I am guessing it won't even be the original that is returned.
I suppose that is the cost of selling on Ebay.

And breathe.