The sun sets on the Salt River Range near Etna, Wyoming, in the heart of Star Valley on an early February day. Today’s Jackson Hole real estate activity: NEW: Freedom 35-acre building site, listed by Coldwell Banker Country Estates for $315,000. NEW: Etna, Wyoming, 4-bed, 1,792-square-foot home built in 1998 on 5 acres, listed by Jackson Hole Real Estate Associates for $475,000. NEW: Star...