I've sold linux mint laptops on ebay and I always reach out after sale basically saying "just to be clear, this isn't running windows, it's linux. I'll be happy

I've sold linux mint laptops on ebay and I always reach out after sale basically saying "just to be clear, this isn't running windows, it's linux. I'll be happy to cancel if this isn't what you expected" and 100% of the time the person was like "yes! Linux is what I wanted" Well alright then, there you go...