Anything on this title is beyond scarce. Well done! I think that's more or less the same art as on the French 1p (which I've only seen photos of, never offered for sale).
I saw the French 1p for Rififi on eBay maybe 1-2 years ago. I was tempted but if I recall correctly the seller wanted ~$800 and the poster was in lesser condition. I didn't pursue it since by then I had decided to focus on Mexican posters.
But yeah, it seems to be darn rare and I have never seen the 1p for sale before or since. I am not sure if that specimen ultimately sold on eBay or if the seller just let the listing expire. I don't see a record of a sale on worthpoint.com but I don't think they manage to record every sale.