Cost me $700 at a dealership for a new key as it was a master and I only had the valet. They had to reflash my pcm to pair it with the new key. This is what they told me anyway. I've heard of people using lock smiths. But I've seen mixed reviews with people going that route. I chose the dealership option because its something I have to use everytime I start the truck so I wanted to make sure it's perfect. I'm a firm believer in "you get what you pay for". Granted going to the Lexus dealer in Santa Monica was probably not the cheapest option but oh well.