almost retired

Hi and thanks to one and all that read and respond to this post. I am looking to purchase a 2014 Toyota Corolla LE at a dealership in the Toronto/York Region area. Does anyone have an idea what a good deal would be? Based on your experiences, is there one dealership over others you would give your business to? The 2014 Toyota Corolla LE has an MSRP of $ 19 500. Is anyone aware of what the actual dealership invoice would be on this vehicle? Many thanks for your attention to the above.