Seems like a good price but what do I know - I don't live by you. Also can't tell if it has a hechsher but the listing says 'Kosher'.
Heinz Yellow Mustard (8 oz Bottle) ($1.67 $0.97)
It's about half the price if you buy the:
Heinz Yellow Mustard (20 oz Bottles, Pack of 24)
for $250 option