As 1960s Marvel Key issues go, ToS #39 is right up there with the best of them.
Not as common as Avengers #1 but not as scarce as Journey into Mystery #83, the huge success of the movie franchise starring Robert Downey, Jr. has made Iron Man a household name, and kept prices buoyant.
Don't cheap out with a 0.5 or 1.0 ragged copy of this book. Save up for a VG with a nice-looking front cover. Note that the sea green color is prone to fading; try to get an example with the green as pure as possible.
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