1. A method, comprising: at a vehicle data system running on one or more server machines: converting data into a plurality of variables, wherein the data is associated with a plurality of vehicles of a set of models; generating order statistics for each of the plurality of variables; applying a weighting factor to the plurality of variables to generate a price flexibility score for each of the plurality of vehicles; and determining a negotiability index utilizing the price flexibility score for each of the plurality of vehicles, wherein the negotiability index indicates a potential range in purchase prices of the plurality of vehicles.