Just last week I bought a pack of 12 screen protectors for about $4.00 off eBay for my iPhone 4S. Of those 12, I could only apply one perfectly, but that one was a total POS that scratched ridiculously easily. It was scratched to hell just after 5 days of keeping my phone in my pocket 8 hours a day. So, I need to get new ones. They need to be cheap (less than $5), in a relatively large multi-pack (at least 5 or so), don't ruin the retina display, and are pretty durable. I know, you get what you pay for, but surely there's some decent cheapies out there.