Both Walmart and Target carry the small 4 oz size of Ball RealFruit Pectin for right around $.99. Use the $1 Ball RealFruit Fiesta Salsa or Pickle Mix Pectin printable or $1 from 6/12 SS to get some for free! The printable doesn’t expire until 10/31, so that should give you time to find some if your store is out.
(Thanks Mashup Mom!)