They are timewasters. I offered to pay six months in advance. There was one property that I particularly wanted to see and the agent who took my details said she would try to arrange a viewing but this might be difficult as it was tenanted. She did not ring me back. I contacted her again a few days later. Again she said she would try to arrange a viewing but did not ring me back. After two weeks I still had not viewed the property. Then another agent there told me that there had been viewings as they did have the keys to the property and would I like a viewing? I said yes but half an hour before I viewed it it became unavailable.