Hi i am lead to think automatic pricing software may be used but I am not sure. Some of the mega expensive listers on amazon get feedback so someone buys at their prices possibly they don't even have the book but dropship it from another seller.

 On a different note as a collector of observer's books you may want to add to your discription  and or picture  on your copy of automobiles saying or showing how bright the spine lettering is as this can make a  difference to the price you may for it.

regards Roger.