I am in the process of have a resin bound driveway installed. 105 square meters. In my initial searches on forums like this a figure of £60 to £90 a square metre was consistently quoted.
These quotes never include the groundworks required to get to the final product. I had quotes for the whole job between £8K and £20K+. The company I finally settled with are charging £120 a square metre and that is after some negotiation. This includes excavating the driveway area, MOT1 sub base, open tarmac sub base, resin bound gravel and all retaining blocks and threshold from the street.
So to get a true price for whatever surface you go with be sure to make sure the price per square metre includes everything even down to recessed manhole covers etc and not just the finish surface product.