Wendy house scam

These people are advertising cheap Wendy houses for sale. They wanted to be paid in cash after the delivery of the Wendy house. The agreed time was 2 pm, but they never arrived and apparently got lost, and then they were stranded somewhere without petrol etc. I think that they played for time and that they knew that the cash was on the premises. We got suspicious and told them that the transaction was cancelled. We have not heard anything since then. Please be careful.