MASTERY MART 28 Inch Office Chair Base Replacement, 2500 lbs Capacity, Heavy-Duty Metal Base for Swivel Gaming Chair, Universal Caster Hole, Matte Black is up for auction in Office Products. The current bid is $1.00, 98% below the $40.99 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.