It really depends. Does it have a crease in it or is it a smooth round dent like a ball hit it.
My suggestion is to go to a high end dealership and drive around the whole lot to see if a dent guy is working or not. If its just one dent and not so bad, he might give you a deal (about $40-50). That way he doesn't have to drive to you.
Make sure you don't go through the dealership as they may charge you more. PDR guys are independent vendors but if you go through the stealership, they will mark up to price to get a cut for themselves.
It doesn't have to be a high end dealership but they tend to be more picky on their cars and will only get a good PDR guy to do their work. Just look around their used car inventory and check out their work.