These appear to be some great prices for some of the entries in the GTA series.
GTA V: $23.69 ($20.37 w HB Choice): https://www.humblebundle.com/store/grand-theft-auto-v
Note: if you don't have HB Choice, GTA is cheaper at $21.10 AUD at GreenManGaming: https://www.greenmangaming.com/games/grand-theft-auto-v/
GTA: Vice City: https://www.humblebundle.com/store/grand-theft-auto-vice-cit...
Sale for the GTA series on HB: https://www.humblebundle.com/store/promo/gta-franchise-sale/