Walmart offers the Stanley Tools 24" High Impact ABS Level for $4.12. Opt for in-store pickup to avoid the $5.97 shipping fee. That's $2 under our February mention and the lowest price we could find by $2. It features three level gauges.
Of note, it's also available in 48" for $12.67, also with free in-store pickup. That's the lowest price we could find by $4.