Get the most bang for your buck with this per-unit shopping engine!
If you can't find a good place to buy a specific ingredient for cheap near you, you can see if it's cheaper on amazon based on price per pound. Really nice if you can't find something local.
It's not perfect if the lister messed up the info, but it's a great place to start.
But I legit use it a lot so thought I'd share. Like my nearest grocery store sometimes only has over priced organic things like split peas, w/e. So it's nice to quickly see what the lowest price on amazon is.