That would be a steal. I'd say scam. Even on only inboards. The boats are always the same. Mint, fresh water, insanely low hours. Notice the one picture of just the dash. Nothing identifiable.
It really was. 99.9% of them are scams. Craigslist is covered with them. Now and then there's a divorce sale or parents selling the kids boat like you saw. But most are scams.