How much would it cost to take down dry wall?

The guy I took my apartment over from had a contractor built a drywall wall with a door in it that turned a living room with a small open entrance to the apartment entryway into a second bedroom. I will eventually have to take this wall down before I leave and was wondering how much it will cost. As far as I know its just pure drywall, and doesn't have any electronics or pipes or anything going through it. There could be some sort of touchups on the walls it was touching though. What sort of price range am I looking at to take this wall down and how long will it take?