How many chickens could I truss with more than a half-mile of twine? We'll find out, though I might be using the same bale when I'm 80.
Available at Smart & Final for $10.49. That's $0.003 a foot. I'm sure you could find a small ball of twine at a grocery store, possibly in the baking aisle where they sell the baking sheets and stuff, but you'll pay much more per foot, maybe a whole penny.