Sure it's been covered before but I came across a Ford oil can at the Columbus Flea Market yesterday and was wondering about it's valve. Paid $6.00 for it and was another sterling case of the seller not knowing what it was. In a field of about 20 oil cans I spotted it. So dirty you couldn't see the Ford in script. Has a block letter E on the opposite side of the container. Cleaned up fairly well & no holes. About 3 3/8" in diameter and 6" high.
That's pretty good, but I beat you at Hershey last October: $2. I tried not to look too surprised and delighted as I turned over the dough. The situation you describe, where they don't know what they have, is wonderful, but doesn't happen often. Prices I see on these cans are usually from $15 to $40. Shortly before I bought that two dollar can I passed on one priced at $60.
You got a good buy. Keep in mind, there are over a dozen different designs of oil cans, for many different years way into the thirties.
Anyone care to share some photos with some descriptions of dates for the cans? I'd love to learn a bit more about them and what to look for.
Some earlier posts on Ford oil cans
One just sold on T-Bay for $102.50 It had a 1908 patent date on it.