There is a nice article by Roy Hess on Ford script oil cans in Volume 50, #4 (July/August 2015) issue of "The Vintage Ford" from the Model T Ford Club of America.
He surveyed eBay for 6 months in 2012-2013 and observed 427 cans for sale of which 295 sold for $9-$184. Sixteen different cans were identified including some "new" ones made by an original manufacturer, Eagle, given away as promotional items in the 1980s.