Thumb Score: +19 Walmart.com has California Air Tools CAT-4710SQ 4.7-Gallon Steel Tank Air Compressor on sale for $97.05 w/ store pickup discount or $99 w/ Free Shipping. Thanks c2nah777 Deal Editor's Notes & Price Research: The Quiet Flow 4710SQ Air Compressor is designed to be one of the quietest air compressors in the industry having only65 decibels of sound.