The price range is dependent on the condition of the D-777. If you a big fan of "powerful sound," meaning that...very punchy bass, nice midrange, and good high. This is a player for you. The sounds quality of the D-777 tops the newer D-EJ915, D-EJ925, and D-EJ01 just fine.
The price range should be from 100 dollars (good) to 180 (excellent condition). Good luck on finding one. The chasis is very classy and glossy finished.