As one of its daily deals, All4Cellular offers this Glare-Resistant Screen Protector for iPhone 5 3-Pack for $1.74 with free shipping. At $0.58 per protector, that's a few cents under our February mention, the lowest total price we could find by $2, outside of the price below, and the best per-unit price we've seen. This pack also includes a cleaning cloth and applicator card. Deal ends today.

A close price: JunkTent via eBay charges $1.75 with free shipping.