The 1911-D Indian Half Eagle is one of the hardest to acquire in the series, only the 1909-O and 1929 are tougher.   As such the price scales up more than 50% with each increasing grade.  This means that an AU58 represents an obtainable and quality coin for this issue in a value spot when it can be found.   The PCGS and CPG price guides converge in MS61: $9000, MS62: $14,500, and MS63: $36,000.  This example in AU58 exhibits strong luster under the light and deep russet golden surfaces, no major detractions.  Hence originality of the surfaces that meets the tough CAC standards.  Just a cool coin.
 
CACG Cert. # 726075774