Beauty queens and nudie pics go together like Farrah Abraham and porn ... the latest example, a photo of Miss Alabama flashing her giant knockers -- which is being shopped to the highest bidder.
Our sources tell us ... someone is hocking a pic of Madeline Mitchell, who repped Alabama in the 2011 Miss USA pageant. At the time she was known as the hot chick who was in a horrific car crash.
As for the pic -- we've seen it. It's a selfie and she's topless -- showing off her HUGE southern melons -- smiling from ear to ear. Her hoo ha is covered.
It's unclear how the seller got the pic ...or if there have been any offers.
In other Madeline news ... she and her fiance recently taped an episode of "Get Out Alive" with Bear Grylls ... where you can see her -- sorry, clothes on.