When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
there are still petroleum derivitives in E85, about 15% so yeah the other things you have mentioned may contribute to increased prices, it is still gas...
After accounting for denaturing, its closer to 20-25% gasoline.
I'm sure the E85 stations are aiming to sell E85 at a price point that makes the most money while still retaining sales volume.