Length and width, guage, signs of corrosion etc? Really hard to tell just from one picture...helm and rear deck layout? Deadrise? Transom depth? Maybe I care about these things while others can comment on value without knowing? Overall quality and craftsmanship, condition of the welds? Any repairs done? The boat looks custom or at least semi-custom? I am not an 'alumaman' though, I don't even really know the basics...