extra keys

Hey guys, i was wondering if any of you knew how much dealers are charging for extra keys. I want to do remote start on my car and i need one, but don't want to go in and pay the usual gouge rate they try to throw at you...
 
you don't need to buy another key. you can just get a transpnder box that simulates the signal from the keys. But if you want a new key you can buy uncut ones on ebay for $15-$20 you just have to get them cut and you can program them your self in the car. I've heard the ones form Ford are salty.
 
The keys are encoded with a transistor, therfore just any regular key wont work. You can get replacement keys all over the internet and program them yourself, one site that I use alot is Howard Keys.