The other factor that comes into play is that Riding season for most Dealerships is over, taking in additional stock when sales won't pick up until spring will only tie up their money.
Best time to SELL a bike and get top dollar is between Spring and early Summer
Best time to BUY a bike and get the lowest price is November, December and January
Timing is important.
Except in AZ...
2015 HD Ultra Glide
2017 Mustang GT Premium
1997 Low Tahoe
2002 HD Road King