Mine ran $2957 for a pristine floor model that had been in a low-traffic showroom for about a month -- no additional warranty. The place I bought it from quoted me $3200 for a new, in-the-box 57TWX20B. Chances are that price would come down some with a bit of haggling.
However, you will need to take into consideration your local area prices. Here in central Florida, CC consistently runs the 57SWX for $3000. Compare that to what CC sells it for in your area and you can get a general idea of the regional price difference.