That is not unusual hogbay....I think most of the duplicate answers are because ebay tells you to post again.:O

Like you, I do not understand the OPs problem with who uses the keyboard.  They are dealing with the ebay ID, not the specific person using the keyboard.

My OH uses this ID to buy occasionally (very occasionally) but why should that be a seller's problem...I would be fully responsible for anything bought (as far a paying goes) so why would a seller not stand by any claims originating from the ID.