Ballpark: 5,500 to 7,500. (hard to define "good condition" if you haven't seen the boat
Have him check the little things like livewell valves, oil usage (if oil injection), switches on panel, etc. Not that these are major reworks but they could be used to negotiate a better price.
I am no expert but I do own a Tracker 1800TF which is this same boat but three years older.