Again, I think you could make an argument for either player. Pennies on the dollar is a bit of an exaggeration. Here is my argument for Arenado:
Arenado is cheaper ($21, $16, and $15 compared to $37, $32, $32 and $31) and more durable (missed 42 games over last three years compared to Carlos missing 129 games). In his last three years, Arenado has averaged .277/24 HR/89 RBI compared to .277/18 HR/61 RBI.
Yes, I know CC plays SS, but he could easily play 3B for his new team and we could easily sign Jose Iglesias for a year or two, along with other FA with the savings.
What is your argument that Arenado would be "pennies on the dollar?"