Buying a used 2000 Ford Explorer XLT

Hello, im hoping someone here can lay some of my fears to rest about this car. Its a 2000 Ford Explorer XLT with 175k I have test drive and the car runs smooth and is really clean, starts up great. As point of fact, hears the page for the truck
http://www.onceanddonemotorsports.com/2000_Ford_Explorer_Paradise_CA_222877166.veh
Oh and hes lowering the price to 3k for me.
Any info would be great!