These people who made this listings dont really think straight. They put stuff like you can make up to $100/day, etc, etc.
They list their home address for pickup, and they dont worry that they will come back and demand a refund?
I think that the ones who are doing this were the ones who bought GPUs in early 2022 and they are sitting at a loss and want to recoup their losses.
Most people I know who are new to mining they all funded their gear with credit cards which charge 20% interest.