This one has been up on ebay for a few days, but no nibbles yet! I really didn’t want to let go of it so am happy/sad no one wants it. The language on the card is indicative of the racial prejudices of the time; it was printed in 1954 by the Curt Teich Company. Ebay 400001748602 if you want to take a closer look!
There really is a Spook Hill! The white line is still there, along with a sign giving the instructions. The grove has been replaced by private homes and Spook Hill Elementary School. Of course the school has a friendly ghost as a mascot.