Today only, Chitek offers the Acase Screen Protector for iPhone 4 / 4S 3-Pack for $8.50. Coupon code "75TKUJZV" drops it to $3.25. With free shipping, that's a $5 overnight drop, tied with our mention from last week, and the lowest total price we could find for this 3-pack. It includes three front screen protectors and three back screen protectors. Deal ends October 31.