Reminds me of my days valeting cars. My iPhone 4 (new at the time) slipped out of the super slippery pockets that dress pants have, had to look through like 40 cars hahah but I found it. Some of the other valets have seen their phones drive away with new owners just like your situation. It's a ******* situation but there's still some hope. On a side note, you could always get a 5s on eBay, I got my flawless 2 month old 64GB 5s for 540 bucks, enough to buy two with that 1200. Hopefully it turns up for you.