Last Saturday I visited a small town nearby. I saw a poster advertising an estate auction. I went there. I was three hours late from the 9 am start. There were a rather large amount of coins. I found out that credit cards were accepted. I've never been to an estate auction before. Pitchers, plates, old signs seemed to be of significant interest.
The collector (estate), for example, had folders of pennies, about ten folders of 1941-1974 pennies. I looked at five or six. All holes were filled. The steel cents didn't look great. Some of the other pennies were not great. Only one man bid on those. He got all for $5 apiece. There were about five people bidding on coins. There was overbidding on Morgan dollars.
I managed to buy a small amount. I got for example two brown Ikes for $4 dollars. They did not have the outer package, just the plastic holder. There were some very old large pennies in pretty good shape, and other old coins. A man with a book of coin values bid and "won" many of the old coins.