nelsonrx300

Hello, I need an advise if it's worth it to buy an extended warranty on my RX300 That I just bought used from a dealer. I have a 2002 model and have 26500 miles on it. I still have 23500 miles or untill 2005 left on the original Lexus bumper to bumper warranty. It will cost $1600 for the extended warranty to 100 k miles.