I think this is my rarest and most valuable to me, bought off of e-bay some 20 years ago or so. I built this kit in the early 70's as a kid and loved it, so when I could afford it I went looking for one and found it. Once I had one I wanted to build it again. I found a badly built up one for 10 bucks on the bay again, bought it and built it. This is how it turned out and still have the one in the box. It is the best of both worlds.