Home Food & Restaurants Cowboy 20lb Hardwood Lump Charcoal $9 Walmart In-Store Pickup Only. Food & Restaurants Cowboy 20lb Hardwood Lump Charcoal $9 Walmart In-Store Pickup Only. By ARCOM - 8 January 2019 136 0 SHARE Facebook Twitter Go to the deal page: Cowboy 20lb Hardwood Lump Charcoal $9 Walmart In-Store Pickup Only.