Kobe Bryant is at war with his mother Pamela Bryant who is trying to sell his high school memorabilia. His mom is said to be selling his old jerseys, varsity letters from high school, championship rings, and trophies. Pamela has taken all the stuff to an auction house, claiming he gave it all to her, and she got a $450,000 advance which she says she’s using to buy a house in Nevada. Kobe contacted the auction house and said they had no right to sell any of the items because they belong to him. Sources connected with the Bryant family tell TMZ … the dispute between mother and son erupted over real estate. Kobe offered to buy his parents a “nice house” in Vegas for significantly less than a million bucks, but they wanted something bigger and more extravagant and Kobe drew a line in the sand and refused to up the ante. Pamela was infuriated and believed Kobe was shortchanging them, especially compared to what he does for Vanessa’s mom, Sofia Laine. Kobe put Sofia up in a $3.2 million house in Newport Beach, CA, which sold recently. After the sale, Kobe moved Sofia to another multi-million dollar mansion nearby. Sources say Kobe’s really upset because he believes he’s stepped up for years, by giving his parents millions of dollars and buying them homes and cars.