Most of them I purchased off the TL. I did draft Kang though, he was a 62 tsp HOF if I remember correctly, absolute stud. Even with drafting him I lost money, but got tons of wins with him too and he ended up being one of the best USA players we've ever had.
Nice! Yeah, Kang was a stud. Now imagine winning a B3 title with a homegrown NT player like that... it would be beautiful!
story was insane. I can't remember any player selling for more than him. Looks like he sold for 9.69m after the draft, then a team bought him for 3m, then I bought from them for 4.4m and sold a while later for 6.7m. He might be the top player ever for money being thrown around for him lol. 
I was a bit off on my recollection. The Leach situation was a weird all around. The only other US trainee that sold for big money that I can recall was Xermade; Brian purchased him at age 21/22 for 7m. In both cases, the market was inflated.
"You will lose." -Ivan Drago