Only three weeks after LG slashed the price of their curved 55" OLED TV to $6,999 (it was briefly selling for $6,499 too), Amazon now lists the 55EA9800 for $5,999. Amazon will also throw in a $500 promotional credit if you buy the OLED TV now. There hasn't been any official word from LG or Amazon on this price drop, so it may be temporary.
In August 2013 LG launched their 55" FHD curved OLED TVs in the US $14,999. The price keeps falling quickly, and the new price represents a 60% price drop in about 8 months. When LG's upcoming M2 Gen-8 OLED TV fab starts making panels in a few months, the prices will probably be reduced even further.
During CES 2014, LG unveiled new OLED TVs, including 55" 4K ones. It's possible that the company is now clearing their Full-HD OLED inventory and will soon start offering only 4K OLEDs. In any case, it's clear that LG is currently taking the lead with OLED TVs. Samsung's own curved FHD 55" OLED TV still costs $8,999.