Long story short - a Neanderthal that believes he is genetically superior to humans, and lives in a nuclear bunker, has been making this game since 1994. He has promised on many occasions over the years that it was finished and about to be released, to the point of absurdity. It's a rather shoddy and severely buggy WIzardry clone, but a funny cult has grown up around it, and they consider the coming of Grimoire will be a seminal moment in human history - an event they refer to as The Incline.
You probably didn't need to know that.
What I suggest is that you're right, and there's no way it's worth the asking price. If it's your sort of thing, get it at a bargain basement price if and when he gets it running properly, and when reviewers have confirmed it can even be completed.