Bought it in NW Iowa last week for $3.05. Cheapest I found it today in the western suburbs is $3.29. Still, at $2.00/gallon cheaper than gas with 0% ethanol the reduced mileage is more than worth it. Plus, might as well help the local economy when I can.
Edit: You have to shop around in the the metro as mentioned above. I found it at Kum and Go but the Kwik Stsr across the interestate was $3.69.
I have been buying E85 at Kum & Go in Ankeny. Started buying a month ago when E10 was $4.50 and E85 was $2.89, in the last couple fill ups it was $2.99 and then $3.29. Debated $3.29 but E10 Was $4.74 so I decided to fill with E85. Haven't used Kwik Star in Ankeny because it was way more expensive.
Last weekend I filled up in Sibley and Kwik Star had it for $2.89. It was a new store and apparently, they are competing with Cenex across the road.
I run it in a 2012 and 2014 Durango. 2012 has 195800 miles on it and never has had fuel issues. I still try to run 1 tank every 3000 miles of Top Tier fuel.
My simple math that makes it close is to buy if it's 75% or less than E10 and it's close to even or better on the cost.
Durango's are nice as they have 500 mile range with E10 so it's not a big deal to have lower mileage to get a lower cost.