I looked it up separately .... boat ~$3400-3800 motor ~ $1000
I did not, however, put any add-on equipment in the boat inquiry. And I did not factor in the trailer value. Looking at some sales ads for same outfit (or close), I found prices ranging from $3500 to $5000 & higher ... depending on location & overall condition + equipment.
It's only a year older than when you bought it for $5500 .... I think your original asking price was reasonable, and fits within the NADA value range. Put pics & description on Personal Classifieds Forum, and see what happens !!
... cp