I got my base auto RSX in Feb. of this year in Ga, and paid $19374. That was $500 below invoice. I knew the RSX's weren't selling, and the dealer wanted to move some units off his lot. Of course, they tried several times to "comprimise" and wanted me to "meet them halfway". But I didn't flinch, and refused to budge off my price. After all, I didn't care if I bought the car that day or not.
So do your homework, find out invoice price. Then go play hardball. The economy, and low RSX sales, give the buyer a good advantage. Don't be scared, make them a $500 below invoice offer. The worst that can happen is they will say no. If so, say thank you and go to another dealer.

Happy Hunting,
Tony