Before you buy go to
www.edmunds.com and
www.kbb.com and punch in the year, model, equipment, mileage and condition and they will give you a good idea of what it is worth. After you're sure it's a good good vehicle at a good price, make darn sure you run a CARFAX on it.
www.carfax.com Costs $20. and it can save you a whole lot of grief down the road, then you know it's history, where it lived and if it was a lemon buy-back, wrecks, flood victim, speedometer rolled back, etc.