PORTLAND, Ore. -- A warmup jacket worn by Wilt Chamberlain during the 1972 NBA finals that was bought by a teenager for $3.07 at an Oregon thrift store sold for $89,600 at auction on Monday. The jacket was auctioned by Sotheby's, which had estimated its value between $150,000 and $250,000 before bidding closed Monday. After buying the Chamberlain jacket back in January, Brown searched online to see if it was worth something. When he posted a photo of the jacket on social media, Sotheby's contacted him about consigning the jacket to the auction house. "As photomatched items worn by Chamberlain become exceedingly rare, this jacket is a piece of sports history."