Search for a missing shoe

A lady who lost one of her designer shoes, which cost around £400, has been handing out leaflets, sticking up posters and offering a reward in order to find it. According to this article in The Telegraph  her husband bought her the shoes for Christmas. When she was on a night out she changed to flats and put them in her bag, but she thinks she dropped the left shoe at a taxi rank. What lengths would you go to if you lost one of your shoes?