50 Sheet Black Cardstock 8.5x11",250gsm/92lb Cardstock Construction Paper,Premium Printer Paper for DIY Projects,Scrapbook Supplies,Invitation,Business. black 50sheet is up for auction in Office Products. The current bid is $2.50, 84% below the $15.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.