The Big Mac turns 50 this year — the perfect occasion, McDonald's crackerjack PR team figured, to hype the sandwich by auctioning off the first-ever bottle of special sauce in the U.K. To ensure a frenzy, the chain created an eBay listing two weeks ago that read: "This is the only bottle of Big Mac Sauce that's ever been available to the public in the UK and isn't available for sale anywhere else in the country." The starting bid was £3 (about $4.33), but with this kind of scarcity, people sort of expect a couple Martin Shkrelis of the fast-food-novelty world to hijack the bidding and run the price up to something ... (full story)