Garnett spent the first 12 seasons of his career in Minnesota after being selected with the No. 5 pick in the 1995 draft. In 2007, the Timberwolves traded him to the Boston Celtics, where Garnett spent six seasons before being dealt to the Brooklyn Nets prior to the 2013-14 season.
The 38-year-old has earned 15 All-Star nods and four All-NBA first team selections over his 20 seasons in the league.
Forbes valued the Timberwolves at $430 million in January.
"I want to buy the Timberwolves. Put a group together and perhaps some day try to buy the team. That's what I want," Garnett said after a 107-99 loss to the Golden State Warriors on Thursday night.
Over eight games with Brooklyn this season, Garnett has averaged eight points and eight rebounds.
- Chris Johnson