Someone's trying to buy my house as is without even looking at it?

They sent a different letter a few weeks ago. I've never seen them in person. The website also gives no additional information. How legitimate are cases like this

http://imgur.com/a/GWjSMnG

Submitted September 25, 2019 at 05:23PM by snowysora https://ift.tt/2lCnQXH