The key here, I think, is that he is a SF. It can take upward of 7 seasons to train a quality SF. Imagine if the guy who sold for 7.25 million had 6-7 tremendous skills, plus add a couple more in the prominent range. Then he is worth at least 7.25 million, probably even more.
Now, imagine the guy with just tremendous jump shot and atrocious-inept in everything else. There is your 1.8 million guy (maybe even less).
Run of the Mill Canadian Manager