$100 isn't a good price?
Awesome, thanks. What's this I hear about a GS5 Prime though?
The GS5/M8 prime are rumored bumped up phones to compete with the LG G3 and the iPhone 6. Might be right around the corner if you're willing to wait. Couldn't go wrong with an iPhone unless you're set on android. I personally think the GS5 is a great phone. The screen and camera in particular are a really big step up from the Nexus 5, and touchwiz offers some features that aren't present in stock android. (Private mode, power saving mode, etc). The water resistance is also nice for peace of mind
one thing I do miss with the Nexus 5 is the simplicity of the design, and it's relative compactness.
Edit: almost forgot. The GS5 has a micro SD card slot and a removable battery, so it's much better for the long term. One thing the Nexus 5 had in it's favor however was Qi wireless charging built in. (You can buy a replacement back with wireless charging for the GS5)