DUSPRO Recycle Premium 4-in-1 Mushroom Substrate Mix with Coco Coir, Zeolite, Gypsum & Vermiculite – Ideal Mushroom Growing Mix for Gardening, Moisture Retention, pH Balance & Ready to Use Mixture 8QT 8 Quarts is up for auction in Patio, Lawn & Garden. The current bid is $5.20, 80% below the $25.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.