find it interesting why the denon a/v receiver 788 costs more than the identical 1908 when the only difference is that the 1908 has an extra remote? so it should cost more. Online prices seem to vary
MSRP of the AVR1908 is US $599 and the AVR788 is US 549. The difference is the extra zone remote control. And you are correct, online prices can be all over the board.
Here is a link that might be useful: Click to compare AVR1908 to AVR788