Yippee! Get a natural high. Portsmouth Used Car Superstore. Call 603 766-7680. Located across the street from Water Country on RT1 in Portsmouth, NH.This great acquisition just got here and is going through our 70 point inspection now.. Once our team of certified technicians are done giving their stamp of approval, it will be Key Auto Certified!! That means you get free inspections for life, a 3 day exchange policy, Balance of any factory warranty still available, your first oil change for free and a host of additional benefits. Be the talk of the town when you roll down the street in this fun 2013 Nissan Maxima. You just simply can't beat a Nissan product. The only thing better than our prices and vehicles are our friendly, non-pressure sales staff, come talk about the car of your future with one of them today!