How much can I expect to save on a new last years model?

car dealers locally like to add on a $300 documentation fee. I am willing to give them $100 doc fee so after we agree on the selling price, I have them take $200 off the base since they have to show the $300 on that line for upper management's requirements. figure out what you want to pay for that unit without the added BS, PDI, etc.
bumpy