That sounds a bit high to me. From what I've seen, about $250 for a maple board is more common in most areas (guitar or bass). That's from someone who knows how to do it without having to refinish the neck. The frets were installed from the side, and they need to be removed the same way or the surface will get chipped and have to be filled and repaired. If you decide to have it done, make sure it's someone who has experience doing it the right way. Some shops won't do them at all, which is better than taking it to someone who will hack it up.
Edit: take a look at this, this guy (Bryan Galloup) owns the shop originally started by Dan Erlewine. He also teaches courses in repair and building.