It cost me over $2000 and that was just buying the parts. With the exception of the gauges and the speakers, I redid everything myself. If you are paying someone to do it for you, it's probably another couple thousand. Here are some rough numbers...
gauges...$650
dash pad...$600
dash harness...$520
wood grain...$250
speaker...$50
glove box liner...$20
Then you have the paint for the dash frame and heater controls. New bulbs, flashers exc... It's definitely not cheap. If you need your radio redone that can be another $500. I was really worried about tackling that large of a job but it wasn't bad once I got into it. I actually enjoyed it.