HELP!!!

i got a 99 Camry XLE - transponder key does not turn in ignition. yes i tried holding the steering wheel, etc - it won't turn anymore to start the car.

toyota dealer is telling me i need to replace the transponder key and ignition cylinder combo for around $600! is this true?

QUESTION: can i buy a non-transponder key & cylinder (for so much cheaper) to replace what i got, will this work?

thanks,
rob