On hubby's ID, which is basically for selling unwanted &/or no longer used 'junk' from around the house, we usually list as Pick Up only as it's second hand & request Pay on Pick up, so if someone isn't happy, pure & simple, they don't pay & we just re-list, everyone is happy, but I am often amazed by the number of people who ask 'Will you post to wherever ?' and we've had quite a few buyers prepared to pay what I would consider ridiculous amounts of postage, simply because they say they cannot buy the items anywhere near where they live.  Just another possibility to add to the mobility issues & agoraphobia