At Amazon, for its Prime members only, buy one Bissell Stomp 'n Go Stain Lifting Pad 5-Pack
and get a second one
with free shipping
. (Add two to your cart and the discount applies at the final stage of checkout. Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.76.) That's $0.60 a pad, the lowest total price we could find for this quantity by $6, and the best no-rebate price we've seen. They purport to remove tough stains like red wine, fruit juice, and more.
Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.