With the Cleveland Cavaliers missing out on playing in the NBA Finals, fans and collectors can now take home game-used memorabilia connected to the celebrities the team hosted during their Eastern Conference finals loss to the New York Knicks.The Cavs and memorabilia company The Realest are auctioning off the courtside chairs from Games 3 and 4 at Rocket Arena that celebrities Taylor Swift, Travis Kelce, Timothée Chalamet, Kylie Jenner, Ben Stiller and Machine Gun Kelly sat in. The seats have been certified as genuine through “The Realest’s witness-based and tamper-proof TRuEST™ authentication system” and the auction is being held on the company’s website until June 14, according to a news release.Kelce, an Ohio native and Cavaliers fan, chugged a beer while standing in front of a seated Swift in an attempt to energize the Cavs’ home crowd during Game 3. There’s no word of any beer stains on Swift’s and Kelce’s seats. In Game 4, MGK playfully snatched a Knicks fan’s hat from the second row and threw it to the floor. Chalamet, Jenner and Stiller invaded Rocket Arena to support the Knicks for Game 4, with Chalamet hugging guard Jalen Brunson after New York completed the sweep.Other items being auctioned off include the Game 3 used basketball and the nets used in each Cleveland-hosted game from the Eastern Conference finals.