I had gotten the Viper 791XV remote start & alarm with the perimeter sensor and the guy charged me $780.00 I do live in NY where everything is always a little more. This alarm is the one with the interactive display on the remote. I know I should have shopped around a little bit. But it was an impulse buy. The guy said he could do it the next day so I said sure. Do you think I got ripped off?