Is there anyway you can find the previous owner? Get the Vin # and have a Nissan dealership check it for maintenance records. Ask if you can get it checked out by your mechanic (take it to a Nissan dealership and have them do a "Consult" check). Do the tires wear evenly?--May need adjustable a-arms. Has it ever been wrecked? Plan on spending at least $1000 immediately after purchasing if any of these items do not check out.