A brilliant charity move from LeBron James is living on ... the King is still selling off a bunch his game-worn sneakers -- with all the proceeds going toward his "I Promise" school in Ohio.
LBJ started the charity event a while ago ... giving collectors the option to buy one of his game-used shoes in exchange for a ton of cash that'll help the Bron-backed school in Akron.
Officials at Upper Deck, which is facilitating the sales, say with the purchase of a $15,000 pair ... one of the shoes will go to the collector, while the other will go on the famous "Wall of Shoes" at the school.