I just bought a 64GB iPhone 5S on ebay. I got it for 820 Euros, original Apple price is 900 Euros. I could have gotten a 16GB 5s for 700 Euros on ebay instead (Apple price 700 Euros). I don't need more than 16 gb of space actually. I could probably sell the 64GB phone that I bought without losing money and then buy a 16 gb instead. What should I do? Sell the 64 GB phone now and get the 16 GB version or keep the 64GB phone and hope for a good resale value in a year or two?