The 1936-S is the fourth lowest mintage of the 14 Oregon Trail commemorative half dollars and it is indeed the fourth rarest in total number of survivors, surpassed in rarity only by the three very low mintage 1939 issues. There were 5006 originally minted and the issue price was $1.60 per coin. The 1936-S had good initial collector demand and in the summer of 1936 they were bringing as much as $5.50 in various dealer offerings.
The 1936-S, like all Oregons, comes very nice. The surfaces are normally very clean and the luster is usually frosty and excellent. The typical grade is MS64 to MS66. This issue is virtually unknown in circulated grades as the entire issue was saved.