My 1959 Martin 000-18. I bought it from a college student in 1965 for $60 and a Gibson B-25. It's had a neck reset and a new bridge, cracks repaired from freezing in Utah and earthquakes in California. Still can make it sound like Son House or Woody Guthrie. It taught me to play. My ambition is to leave it to one of my children. Second place: my Gallagher G-45.