James, the 10-time NBA All-Star and four-time MVP, opted in July to rejoin the Cavaliers after four years with the Miami Heat.
The Cavs' season-ticket allotment of 12,000 seats sold out by 10 p.m. on July 11—less than half a day after James told Sports Illustrated, "I'm Coming Home."
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The team has set up a lottery to give as many fans as possible a chance to buy thousands of remaining home-game tickets. The team's ongoing monthly registration process ends Feb. 26 for regular season home games.
Despite the surge in demand, Cavs CEO Len Komoroski said the team did not raise season-ticket prices, and the average price for individual game tickets would remain the same as the top-tier games from last season.
"We have been very conscious to treat our fans with the same degree of respect and integrity as when we were in our rebuilding mode," he told CNBC for a story in September.
According to TiqIQ, the average price for a Cavs home game on the secondary market as of Wednesday is $358.88, the highest secondary market price in the NBA.