Home Appliances & Kitchen Cowboy 20lb Hardwood Lump Charcoal $5 Walmart In-Store Pickup Only. Appliances & Kitchen Cowboy 20lb Hardwood Lump Charcoal $5 Walmart In-Store Pickup Only. By ARCOM - 16 January 2019 144 0 SHARE Facebook Twitter Go to the deal page: Cowboy 20lb Hardwood Lump Charcoal $5 Walmart In-Store Pickup Only.