The price is nothing special given the description.
I have 3 engines in my garage, 2 of them are seized, but they are still engines.
I can see all the engines in the background as well, all of which are newly painted. So we basically have a guy with alot of engines and a big tin of paint.
I have no idea what nick these engines are in, but they don't claim to be rebuilt, or new, so it's still a punt, and I wouldn't take a punt on an engine at £300.