Great news for Isiah Thomas -- the NBA legend was reunited with his stolen NBA All-Star MVP trophy ... and he's thanking an auction house for making it happen.
Remember, Thomas was initially FURIOUS when he saw the trophy from the 1984 All-Star Game was up for sale on the Heritage Auctions website ... claiming it was stolen property.
Here's the backstory ... Thomas claims he loaned the MVP trophy to his old high school to display -- but some jerk snatched the item back from campus in June 2020.
"This trophy was stolen from St.