William Shatner is hoping to persuade medics who removed his kidney stone to hand it over so he can sell it on auction site eBay. The actor, who played Captain James T. Kirk in Star Trek, claims the stone will become "the ultimate piece of Star Trek memorabilia." Shatner plans to give the proceeds of the sale to charity, but he has to cut through eBay red tape first - the website's rules are strict about the sale of body parts. The 74-year-old actor was taken from the set of his hit TV show Boston Legal last month, suffering from what was initially reported to be chronic back pain. But Shatner has since revealed he had a kidney stone, which he successfully passed after experiencing excruciating pain.