Molasses is another seasonal baking ingredient. Last year, I lamented Aldi's price increase (to $1.79 for 16 ounces). In the end, I found the best price at Big Lots ($1.50/16 oz.)
According to my quick photo, Gordon Food Service sells a gallon of blackstrap molasses for $7.89. In comparison, Aldi's small bottles work out to $14/gallon and Big Lots, to $12/gallon.