I just checked a price comparison site in Japan, and the cheapest 60-incher it finds is about 1350$ (150k Yen).
http://kakaku.com/kaden/lcd-tv/itemlist.aspx?pdf_so=p1&pdf_Spec301=60-60
Why is stuff so cheap in the US?? O.O
(600$ ones are probably of really bad quality, but still...)
Need something off Play-Asia? http://www.play-asia.com/