Its all subjective so i dont think you are going to get many answers. If you do it wont really matter because like I said its subjective. Things all of us factor into our price is our market, condition of the paint, and time.
For instance, paint correction would take me about 11-20+ hours, give or take, to complete the entire detail (exterior only). My market out here is small so i couldnt charge what others in Orange County CA, Palm Beach FL, and Houston TX would charge. Also I would need to see the paint to determine its condition.
The ball park number for price would be between $400 and $2,000USD. My advice is to look at what others in your area are charging.