The only other thing an 05 will have that an 04 did not was throttle by wire. Since Zero Off isn't available (easily) for an 05 MC anyway, I still prefer the feel and feedback of a cable throttle. Agree that the price is a little high and your friends suggestion are more in the ballpark.
Previous: 1993 Prostar 205
Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.
Be kind. Have fun.