hard to tell with the SG. Cause theres not rating for his skills / potential. If he was a announcer with amazing skills he's fetch not very much. Also from what I've read, you can't really base skills on the stats from the game as he might be defending some one crap or being defended by some one crap...
From looks of it I'd hazard a guess that the 19 year old PF would prob fetch slightly more if u sell him off immediately.
But also depends on the skill distribution if it suits the height / position and which of the 5 ball rating potential the two draft candidates are... MVP or All time great.