JD is right on, ask the coach where the offer falls in regards to average as well, and you can pretty much figure out whether it's a good one.
You also have to remember that where you fit in the scheme of things (ranking) will also determine your scholarship worth. A top ranked 50 pitcher in his class will get more than the 250 ranked pitcher.
That is why it is so important to make sure that you get exposure, that exposure helps to determine where he fits. That is especially important if one is considering farther away from home.
But when all is said and done, you are worth more to some than others. My son had offers, 25-35%. Were we insulted, no, just realized that the coach had less money to spend, the offer might have been accepted if he thought it was the right fit, regardless of where he fell in the rankings.
One can beleive what they want when they hear people talk about the offer their son received.
FWIW, most coaches will ask that you and the player keep that private while attending, as it makes for difficult situations if found out by those looking to sqeeze out the max dollars. Understand also what that scholarship may include, baseball money, plus academic, maybe combined with state money, all of this may be considered by some a full ride, most consider bb money only a full scholarhip (ride) of the 11.7 (for D1) allowed.
I think, that with 25% minimum, these days a full scholarhip (bb money only) is literally impossible.
So PUHD, next time you hear that dad state his son got a full ride, just ask, was it all baseball money?