36" Blackstone Griddle/Grill Cover $25 Get it at Walmart Check it out Brad's Deals Editor Marisa, Details This popular Blackstone 36" Griddle and Grill Cover drops from $43 to $25.27 at Walmart. Shipping is free at $35, so add on the Blackstone Griddle Seasoning, Blackstone Taco Rack, or Blackstone Scraper to get to the free shipping threshold. Advertiser Disclosure