this is a code scam

they text a code to you and ask for you to send it back

Received a text from this number stating they wanted to buy a fridge I had listed for sale on line.  They asked several times for the price and then offered to send me a cashiers check for more than the asking price.  They then wanted to call me and verify that I am the owner.  It was obviously a scam.  Do not let them call you.

What kind of scam

They did the same thing happen to me. It is a scam