Once one of the most valuable sports memorabilia items in the world, Mark McGwire's 70th home run ball from the 1998 season has plummeted in value over the subsequent 22 years.
Per TMZ Sports, two prominent auctioneers value the ball between $250,000 and $400,000.
Ken Goldin of Goldin Auctions was on the low end of that spectrum, estimating McGwire's then-record-setting ball to be worth $250,000 to $300,000.
David Kohler of SCP Auctions gave it the same minimum value but believed it could be worth up to $400,000.
McGwire hit two homers Sept. 27, 1998, to reach 70 for the season.