Our definition of petroliana for inclusion in "For Sale or Trade Petroliana" forum includes "auto service and auto dealership signs" but not all the other auto collectibles.
In this "Non-Petro For Sale, trade or Wanted" forum, we are trying to limit items to pre-1970 in the "Vintage Advertising, Country Store, Gameroom, Automotive-Transportation" interest areas.
Hope you understand that we are trying to refine this forum category to only older items and a cut-off date had to be set. So items in those interest areas mentioned that are pre-1970 are encouraged, while items newer than 1970 are discouraged. I recommend offering your 1978 item on eBay instead.