You're going to take a hit if you sell it now. Yes, it's worth $800. range, however, since the warranty is only to the original purchaser, it is selling with no warranty, even though it's a year old. Many that are in the market for that trollingmotor will spend the extra $$'s to get the "new" one with warranty. This means to sell yours, you're going to have to get it down to where someone is willing to exchange the warranty for the price savings.
I know you don't want to hear it, but I see it daily.