In 2019, Kawhi Leonard was wanted by literally every single team in the NBA. Had he been under contract and not a free agent, countless teams would have given the Toronto Raptors a similar or better haul than what the Oklahoma City Thunder received for Paul George.
Leonard was that good, and he proved himself as the best player at the time over players like LeBron James, Giannis Antetokounmpo, and Stephen Curry.
The two-time champion chose the Clippers, and over the years, his trade value has steadily declined. This is not from a production standpoint, as he can still drop around 40 points in the playoffs, but through a notable injury history.