Best Buy has a pretty sweet deal for anyone looking to trade in their old smartphone for something new. Best Buy announced that starting on Sunday May 18th and going through May 30th, you can trade in any working smartphone and pick up a Samsung Galaxy S5 for just $50 on contract with Verizon. You can also get a Galaxy S5 for $100 if you trade in any smartphone and sign a two-year contract with either Sprint or ATT. And that’s not all: Best Buy also says that any customers who trade in an old working iPhone can get an iPhone 5s for free on contract between now and May 22nd. It basically works like this: If you trade in an