Scam to record you saying "yes"

I suspect someone tried to use this phone scam on me earlier this week. I screen calls thru my answering machine. A woman was leaving a message asking about something I had for sale, so I answered the phone to let her know she had the wrong number. When I answered and started telling her she had the wrong number, I didn't have anything for sale, she talked over me, repeating the same sentence about calling about something for sale. Then she started saying "hello" over and over. I knew not to say "yes", I asked a couple of times "can you hear me", then hung up.

https://www.fcc.gov/scam-glossary

"Can You Hear Me" Scam

Scammers open by asking a yes-or-no question, such as: "Can you hear me?" or "Is this X?" Their goal is to record you saying "yes" in response. They then may use that recording to authorize charges over the phone.