I used to have about 20 years ago a sign that I dug out of a farm dump. It was about 6' long about 10" high and said 'Diamond Greasing on the front one sided, in I think white letters on black that were trimmed in red all porcelin,it was in awesome shape and I ended up selling it not long after that for about $50 bucks. (Hard times back then) and I wished I still had it. I've tried looking for one online like it but havent seen one. Has anyone seen one like this and if so do you have a pic? what are they worth now?