This was the first single from the album Big Whiskey and the GrooGrux King - and due to that record's massive popularity, this 7" vinly record should be one to watch in the coming years, as it will only grow more and more popular among collectors and casual vinyl fans.
When you bought the actual studio album on vinyl in independent record stores on June 2nd, you got this for free along with the album. This is a promo, so it will never be for sale in regular stores and will eventually be out of print. Get it for cheap while you can.