Yeah, mabee 650 CFM with no pressure resistance.

The thing will draw no more power than your A/C fan cause thats all it is. Look at the pics, there is nothing more on the inside of the scroll housing than a cage fan. A fan of that type would be lucky to product even a half a psi of pressure if that much. And if it could make that much pressure it would flow almost no volume with that differential. There is a reason why a turbo or supercharger turbine looks the way it does compared to a cage fan.

The worse part of this scam is that two people have bid on it already.

A fool and their money is easily parted. I bet that fan doesn't even retail for more than $50.