OD is v cheap like the others were saying. This is my bruh:
Wow, training OD to 19 on a 196cm player with handling at 11? You took the negative elastic effect to a whole other level.
Each skill is cheap in a vacuum. If your player was JS 19 and OD 7, yes he would have 25k salary, but that's still cheap for a player with JS 19.
With that being said, as others pointed out unbalanced players cost way less, but you can use them only in specific situations. For exampe, if you'd train Brandon's IS up to 19, his salary would be less than 20k. But if he played as a C on offense and SG on defene, he'd be as efficient as possible for that little salary. Of course you could do that only in inside tactics.