Walmart offers the Sassy Disposable Diaper Sacks 50-Pack, model no. 403, for $2. (Amazon charges the same with free shipping for Prime members.) Choose in-store pickup to dodge the $5.97 shipping fee. That's tied with our mention from three weeks ago and the lowest price we could find today by about a buck, excluding the below mention. These bags feature built-in ties, a baby powder scent, and resealable package.
A close price: Kmart has them for $2.12 via in-store pickup.