Most of them end up on Craigslist or eBay anyway. Ebay if you don't want to meet the seller in some dark alley, Craigslist if you don't want to pay and wait for shipping.
This 4.7 Inch S4 Smartphone Android 4.2 13.0MP Camera is a very nice phone and it arrived super fast. It worked right out of the box with my T-Mobile sim card. It is the equivalent to the Galaxy S3 international version so it's a little different but it works well. The only thing is the screen is VERY fragile and a drop from a few inches without a case will crack and spread across whole screen. Phone still works with cracked screen, but it sometimes now will shut off when it has a full charge. It's the equivalent to the Galaxy S3 however cases don't fit bought from eBay, they are too tight and hole for volume control was on opposite side on the case than on the phone.