Bestbuy offers Viper - DS4VB Remote Start System - Installation Included - Black for $229.99 (orig. $319.99) with free shipping.

Product Description:
Control your vehicle remotely with this Viper DS4+ remote start system. The Bluetooth connectivity of the DS4 module provides wireless programming and control with a smartphone, and it includes a temperature sensor to detect when the engine heats up sufficiently. This upgradeable Viper DS4+ remote start system works with your OEM remote thanks to its 3x lock start support. 

• Compatible with most vehicles
  Start your engine with the push of a button.
• Remote start
  Lets you start your engine remotely, so you can get into a warm car in the cold winter or cool your car in the hot summer.
• Keyless entry
  Unlock your vehicle's doors with your key chain remote.
• Onboard Bluetooth
  Provides wireless programming and control.
• Easily upgradeable
  You can expand your system with a long-range remote control, SmartStart control and GPS or security shock/ tilt sensor for more convenient use. Additional fees apply.*
• Smartphone control
  This feature is available via Bluetooth Smart technology which works up to 150 feet away from vehicle and the free Directed SmartStart mobile app, downloadable from the App Store or Google Play.