The first wave of the Halo 4 toy line from MacFarlane Toys was fairly convoluted, with lots of store exclusive figures, chase variant repaints, and the like. That said, the Spartan Soldier figure was not terribly difficult to find, as the armor permutations went. If anything, it seems like MacFarlane played it a little too safe with what armor variants were going to appear in the introductory wave.
Like much of the rest of the first wave, the Spartan Soldier has some of the finest detail seen on this scale of figure. Unfortunately, while gifted with 27 points of articulation, much of it is restricted by the same relieved detail which makes it such a great piece to look at.
This example was purchased at a secondary market discount retailer for only $6. That so many of these figures are making it to this sort of distribution does raise some questions about the future of this line.