We wish it could be done but there is no way in the world you can make a quality treadmill for $400. It defies all the laws of physics. Unless the Russians start making them out of titanium and then subsidizing the export of a treadmill, this will continue to be the rule.
At least they didn't try to put electric incline on this model. Be prepared to repair it when it breaks. There is simply no way to make a treadmill that will last for $399.