A pair of Michael Jordans game-worn sneakers sold for $615,000, Christies auction house said Thursday, shattering a record set just months ago by the sale of another pair of the basketball legends shoes. The sneakers were a pair of Air Jordan 1 Highs that the NBA megastar wore during a 1985 exhibition match in Italy when he dunked the ball so hard it shattered the glass backboard. "This is the original shoe with an actual piece of the backboard, a piece of glass, in the sole of the shoe," said Caitlin Donovan, head of handbag and sneaker sales at Christies -- which organized the auction with Stadium Goods. Jordan racked up 30 points while wearing the size 13.5 shoes, which are in the red and black colors of his Chicago Bulls team, AFP reported. Though the sale broke the record set in May when a pair of Air Jordan 1s sold for $560,000, the new auction landed below the estimated range of $650,000 and $850,000. The record setting sales highlight the soaring market value of objects identified with the retired basketball superstar since the release of "The Last Dance," an ESPN/Netflix documentary that chronicles the saga of Jordan and his Chicago Bulls. It also confirms that the lowly sneaker now has a place of pride in the world of wealthy collectors alongside more traditional collectibles.