Project Source Waterproof Tarps: 8' x 10' 10-Mil (Silver)

This deal offers three 8' x 10' 10-mil silver waterproof tarps for $21, which breaks down to $7 per tarp. While the original price and discount are not specified, this price point seems reasonable for tarps of this size and thickness, making it a decent value for those needing multiple tarps. The "*ad" tag suggests it's a promotional offer.