Don,
The last time I bought, the price was $2.11 a gal. That's another reason why I do not use 100% bio. Superior trucks in the fuel from back in the midwest somwhere I think. That adds to the cost, but it is very good fuel. I use it in my Ford diesel pickup as well. Both vehicles run well on the B20 mixture. You can reap the benefits of bio with as little as a1% mix.