Brian,
If its any consolation, I don't reply to ads either For Sale or Wanted once they are more than 2 weeks old.
It's become pointless, as people don't bother to cancel their ads when they have sold/found what they wanted, so 90% of the time I've wasted my time.
May I hijack the thread to point out to Neil that there are another 2 Wanted ads (the latest 2) without any contact details.
Could this essential part of the ad not be made a "compulsory field" in the advert template?