What’s the one vehicle you’d never let a buddy/family member buy?

Folks should make their own decisions- good or bad- but my buddy was helbent on buying a cheap used high mileage private party Maserati, and I told him I can’t help him work on it, I don’t know where to source parts, and it’s just a disaster waiting to happen that will inevitably need work done that’s above both of our skill levels. Think I talked him out of it…

So- what’s your one “hell no”? Make or model works.