Home Depot offers the Armor All 88" x 17-Foot Commercial Polyester Garage Flooring in Charcoal Grey for $140.13 with free shipping. (Amazon charges the same price.) That's the lowest price we could find by $43, outside of the mention below. It absorbs rain, melting snow, and other liquids, and features a PVC waterproof backing.

A close price: Wayfair via Walmart has it for $141.97 with free shipping.