By Alek Arend The cost to acquire Houston Texans quarterback Deshaun Watson via trade won’t be cheap. The New Orleans Saints are reportedly in the mix to land Watson. Some believe they’re actually in the lead. If the Saints are going to get a deal done, it looks like they’re going to have to give up a former first-round draft pick. Per NFL insider Aaron Wilson, offensive guard Cesar Ruiz could be involved in a Saints-Texans trade if Watson gives the green light to New Orleans. “If Deshaun Watson waives no-trade clause for New Orleans Saints, league sources said offensive guard Cesar Ruiz could…