Kmart offers the Ball Heritage Collection Pint Jars 6-Pack in Purple for $6.75. Opt for in-store pickup to avoid the $7.75 shipping charge. That's $3 below our mention of another color from last fall and the lowest price we've seen. (It's a current low by $5.) Each 1-pint jar includes a band and lid.
Of note, Shop Your Way Rewards members will earn a Kmart credit with purchase and may be eligible for additional credits and discounts.
Update: Note that Amazon now offers them for the same price for Prime members.