Sears offers the NordicTrack Resistance Band Loop Kit, model no. 15321, for $11.62. Opt for in-store pickup to dodge the $5.99 shipping fee. That's the lowest total price we could find for a similar item by $10. The kit includes three bands that offer light, medium, or heavy resistance.
A close price: Amazon has them for $11.74 with free shipping for Prime members.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.