Redfin is responding to a new startup that is hoping to upend the way people search for and buy homes by offering a flat-see service.On August 29, TechCrunch reported that a startup called Landian had emerged from stealth to offer homebuyers a way to tour and make offers on homes through a flat-fee service, rather than paying commissions. That company was co-founded by Josh Sitzer, who sued the National Association of Realtors (NAR) in a landmark case over agent commissions. Under the resulting settlement, ...