Your photos contain the conclusion; the result of the application of a rule. I want to know the source of the rule. I want to see something from a reliable source that specifies what the rule is. You have reached the conclusion that NATs are 1/2 and NCATs are 1/4 Quicksell value by doing the math on the cards. Where is the rule that says that is what it is supposed to be? Maybe your cards are messed up, too.
Why doesn't madden-school.com -- probably the most reliable source on Madden that there is -- discuss these 1/2 and 1/4 rules in its explanation on how to obtain Training and Quickselling cards?
Why did EA itself refuse to give me the rules on Quickselling (so far)? Why did EA refuse to answer pointed questions about it, such as: Is there any other factor in play other than the OVR of the card? Such a simple question.
One nice thing about having the answer provided through someone else (other than EA) in a forum, such as yourself, is that it absolves EA of any responsibility for what you tell me. EA should be taking responsibility for its game and answering questions that I have about its game.
I want to know what the exact rule is, and I want to learn it from EA.