Right now, eBay is offering the LG G3 for just $479.99 unlocked. This is the UK model, so it does only have 2GB of RAM and 16GB of storage unfortunately, but it's still a pretty decent device, seeing as it's under $500. The LG G3 also features a 5.5 inch 2560x1440 resolution IPS display, Qualcomm Snapdragon 801 processor, and a 3000mAh battery. There's also a 13MP camera with OIS and Laser Auto Focus on board. It's a really great phone, and at this price it's tough to pass it up.
LG G3 (D855) - eBay