From what I've seen in the commercial market. The biggest thing that makes a difference is the taxes. The blenders, those that mix #2 with bio. get a $1.00 a gallon excise tax credit for biodiesel blends when using virgin oil. The thing is, that credit is only good up to a B20 mix (I think). When this was passed, the commercial biodiesel producers raised the price of their B100 to the blenders. B100 is almost always more expensive than #2. The difference is made up with the taxes. That's why they sell B99 instead of B100. Try and find a place that has B20. It 'should' be cheaper than the #2, and the B99. Just a thought, it was one of the reasons that kept me from going commercial. Heck, I'd have to hire a near full time accountant to keep up with the government paperwork!