Been thinking of getting a galaxy s4, is now an OK time to buy if I want a good phone for cheap? Do they still run silky smooth or have they started to get slowed down? Found some on eBay for around 200$ that are labeled new but they are open box/returns/etc, so is that a good idea? Currently have Google nexus 4, but mine is pretty beat up and there are some issues with the n4 that will never get fixed like how Skype makes the phone randomly reboot and how snapchat causds crashes too (you can Google if you want but these issues have been going on for years now) Also my volume buttons have stopped working which can get very annoying... So is the s4 a good buy for me?