It's a bit pricey, but not all that much considering the potential benefits of abandoning fossil fuels. You can get it for $129 for a five gallon pail, which works out to $26 a gallon; around three times the price of kerosene. Easily affordable for some, perhaps not for others. When I first posted this I didn't realize there was a biodiesel station within 50 miles of here, since none comes up on the online resources, so that now looks like the better choice for general use. Indoor fire though, now that's an idea!