Good price for Toyota Camry LE?

I went to a dealership in Thomasville, Georgia. I found a 2010 Toyota Camry LE 4 cylinder automatic with added alloy wheels, upgraded stereo system, and bluetooth. Those options equaled about $800. Not sure what the sticker price was, but I remembered they knocked down $1200 from it. I am also trading in a vehicle that is worth $3500 from the clunkers program. After everything, they offered $20,300. We offered $20,000 with the floor mats and they let us walk. Was that $20,300 a good price? It seemed kind of high to me.