Biggest thing look around and see what others are getting for similar items, post good pictures (cause they all want pic's) then figure what you have to get out of them and price accordingly.
When I first got the boat I just had to find out just how fast.... 53mph with just me and PFD, it also will troll down to 1.4 it has a troll-o-matic plate. Like everyone else I wish it was longer