SAN FRANCISCO — The Golden State Valkyries are headed to the WNBA Finals in only their second season, and Chase Center is preparing for a packed opening game Saturday against the Atlanta Dream. The Valkyries secured their place in the championship series by sweeping the defending champion Las Vegas Aces. Tickets for the first two games in San Francisco went on sale Monday evening, and most seats were snapped up within minutes. Remaining tickets have largely moved to resale sites, with prices starting around $300 and some VIP listings topping $6,000. The team’s run has energized the neighborhood around Chase Center, known to fans as “Ballhalla.” Evan Marx, who moved to San Francisco from New York, said the Valkyries’ home-game atmosphere has stood out even compared with the New York Liberty’s following. At Splash Sports Bar in Thrive City, operations manager Kenny Bachman said staff are preparing for an influx of customers and the bar expects business to double as fans arrive for the finals. Nearby, fan Chanel Blackwell was looking for a Valkyries shirt and said she believes the team can win the championship. The series has also drawn attention to a venue disparity for the Atlanta games. A scheduling conflict will keep the Dream out of State Farm Arena, which seats about 17,000. The WNBA had not officially announced an alternate venue, but the games were expected to be played at the team’s regular-season home, an arena with about 3,500 seats nearly 50 miles outside Atlanta. Blackwell called the change unfortunate and questioned whether the same decision would be made for a men’s team. The smaller venue could sharply limit access for Atlanta fans compared with the Valkyries’ games at Chase Center. For Marx, a championship would mean a celebration well beyond the arena. He said he hopes to mark the moment with his wife and young daughter, and imagines a women’s basketball title parade along Market Street. Game 1 tips off Saturday at Chase Center.