A federal jury on Tuesday found the National Association of Realtors and large residential brokerages liable for about $1.8 billion in damages after determining they conspired to keep commissions for home sales artificially high, the Wall Street Journal reported. The verdict could lead to industrywide upheaval by changing decades-old rules that have helped lock in commission rates even as home prices have skyrocketed — which has allowed real-estate agents to collect ever-larger sums. It comes in the first of two antitrust lawsuits arguing that unlawful industry practices have left consumers unable to lower their costs even though internet-era innovations have allowed many buyers to find homes themselves online. Announced in a packed Kansas City, Mo., courtroom, the verdict came after just a few hours of jury deliberations. The case was brought by home sellers in several Midwestern states. Their lawyers hugged and shook hands as the verdict was announced. Under antitrust rules, the presiding judge could triple the damages verdict, which would total more than $5 billion. The plaintiffs also have asked the judge to order changes to how the industry operates.