I had the same thing (one master key). I was quoted $320 by Bossier City dealer and $270
by Little Rock dealer. I have no idea why there is such a difference. I checked ebay and
found key blanks for sale, but nobody in my town can cut a key like that. I can buy a
genuine Lexus key and the dealer can program it to my car. That is my only option and
I'm too stingy to fork over the cash.