The blonde beauty called off her marriage to the 85-year-old Playboy founder just days before it was due to take place in June, and has since listed her 3.39 carat circular-cut diamond with a guide price of between $20,000 and $30,000. A source said Crystal, 24, "couldn`t bear to look at the ring anymore because it brought back bad memories". The lot description on the website christies.com reads: "A diamond ring. Set with a circular-cut diamond, weighing approximately 3.39 carats, to the circular-cut diamond hoop, mounted in platinum." Hugh - who has been married twice previously - let his former fiancee keep her engagement ring, because he doesn`t believe she was "faking" her feelings for him. He said: "I truly didn`t see it coming. I think an argument could be made that she took me for a ride, but I must say, quite frankly, it was a pretty nice ride. "If she was faking it, she did it very well. If you`re looking for an explanation about Crystal, I don`t have a clue. I don`t really feel bitterness. I think I screwed up with us."