Sultan's Run = $105, French Lick Dye course = $400, French Lick Ross course = $150, Country Oaks = $50-55, Chariot Run = $75, Old Capital Club = $65, Belterra = $125, Champions Pointe = $65.
Kick out the Dye course @$400 and the other 7 average $90 (and some of these are probably fall rates). I guess "half decent course" is subjective, but not having played many south of Indianapolis I digress and leave it to the locals.
I lived in northwest Indianapolis for a few years and mainly only ventured up north from me. Bear Slide, Purgatory, The Fort, The Legends, Prairie View, Coyote Creek were the mainstays, and if feeling adventurous would occasionally head up to Purdue for Ackerman and Kampen. Those were all in the $75-150 range on weekends from what I recall.