2. The official Toyota factory web site: PT39889140 - Remote Engine Starter - Genuine Toyota Accessory
Here it shows the list price up front, but if you selected a Toyota dealer near you, you will get a discount. For my Toyota dealer, it also came in at $286.
One word of warning: The same part number fits 4Runners with either the key start or the push button start, BUT the instructions are different. Make sure you get the right instructions.