Do I need to get my Anti-Lock Brake Module replaced?

What is your question?

The brake light is flashing and there is a loud, extended beep when I start the car. My mechanic says it will cost $1000 to replace the ABS module. But then he also says that I don't really have to replace it if I don't mind the light and the beep. I would normally just get the problem fixed but the only thing that makes me pause is the price. What should I do?