Had a big circular drive black topped on my last house. Over 200′ on the outside edge. Back edge of the circle was a 4 stall garage. Cost $7400, and that included digging out existing gravel, and putting in new 6″ of road gravel. That was about 6 years ago. Got a quote for my driveway on the house that I am in now. Driveway is about 150-175 yards long, 2 1/2″ blacktop, $13000, no extra gravel in the quote, but gave me a price per yard if needed. Tried to get a firm quote of everything needed and they wouldn’t commit. I know I needed more gravel, and would have liked 4″ of blacktop. My estimate would be more around $20000 all said and done. Road gravel around here goes for about $225 a load, and I think that’s about 18 yards. Gravel is cheap, if you figure, they put 6″ of new gravel, in addition to the black top, for $7400 for about that distance in my old house. 200′ isn’t much gravel.