What is a bare 340 block worth?

I have 4or 5 of those. At 4 Im keeping them. At 7each I might sell them as a set, not individually. Ive had them since the mid/early 70s. I might be outta line, but theyre not taking up space I need, and Im not hungry,yet. Maybe next year.Lost and found, eh...

Why out of line?They are yours,do with them as you see fit!Im sure that the"price police"have a different opinion.But it certainly would be easy to knock another guys price when you have no parts of your own!I havnt seen a new casting of 340's in years