"What is a big SAT score improvement worth? A whole lot -- sometimes."
According to Forbes....
"Under the right conditions, even pricier SAT prep options can be a heckuva deal. Say, for example, that our student's SAT scores are 1700. That puts him in a good position for admission to Adelphi University (middle 50%: 1480-1780) but makes admission to Stony Brook University (middle 50%: 1660-1970) a stretch. Assuming he'd rather attend Stony Brook if he can get in, what might be the value, in today's dollars, of a score increase that would seal the deal? Turns out, it would be more than $100,000 in future earnings, at any reasonable discount rate."