Why use multiple price-comparison sites? High‑income buyers often target top trims, rare options and concierge services. Those vehicles are less common in inventory and incentives differ by region and model year. Using specialized pricing tools, membership programs and manufacturer portals together helps you find fair out‑the‑door prices and unadvertised incentives. Below are 10 best sites (and site types) to compare new car prices by brand, trim and incentives, with what each does best, …