On Friday, I picked up 3 grill covers that were customer returns. Paid $1 each. They are for gassers, but I'll use them as cheap covers for charcoal grills.
A month or two ago, I picked up a NIB Weber premium cover for an 18" for $5. I asked the guy if he was also getting rid of a grill. He laughed & said he was selling it because he originally bought it from a co-worker, but never wound up buying the grill.