The title of this article is a letter from Barga 1941 is appearing on eBay but actually what probably should have been written was, an envelope from Barga sent to the United States in 1941 is on eBay.
Postal History Italy Scott #225+C17 Mixed Franking on Italian Censored Airmail cover Postmarked 11/25/1941 from Barga Italy to South Norwalk CT USA
The auction can be seen here – there are still five days left and so far there have been no bids apart from the original bid of $12.95.
Slightly unclear also as to why it comes under the heading of postal history but that’s probably because all mail sent out of Italy during those years was censored.