Jason Kidd Sells Giant Dallas Condo -- PEACE OUT MAVS!!!

Jason Kidd has officially severed his final ties with Dallas after the Mavericks traded him to the Knicks -- TMZ has learned, the NBA legend has sold his luxury condo in the Big D.

Kidd listed the 2,607 sq. ft. pad for $1,595,000 back in October, and it remained on the market until June 21st -- when it finally sold for $1,387,500.

Kidd signed with the Knicks last month.

According to official records, Kidd bought the condo in 2009 for $1,420,000 -- meaning he lost a little on his investment ... but nothing like Michael Phelps on his recent sale.

It's a pretty badass condo -- featuring a 4-car garage, 2 fireplaces, a pool on the building's rooftop, and a guarded entrance.

But Kidd's not just dumping his Dallas property, he's also getting rid of his giant house in Arizona -- listing his 6-bedroom, 9-bath, 13,523 sq. ft. Paradise Valley home for $5,995,000.