That's actually how I got one of mone. Poor dude lived in a basement for like 4 months by himself before I discovered him at fair and took him home (with the owners permission obviously)
Personally, requiring vet care for a chicken is ridiculous. If they want to provide vet care, fine. But it shouldn't be required.
I do get the health based on breed standard though. You won't believe how many people think my naked necks are being mistreated because they can't grow neck feathers