Aluminum slant block

So I am going to check out an aluminum slant six block that a guy has for sale. Was pulled because of a blown head gasket and left for dead. Not looking for a rebuild able core engine just more for display and cool factor. I have never ran across one for sale so assuming it looks like it is from the titanic what would be a realistic value? Just have nothing to compare it too.
I wouldn’t personally pay more than $500. It’s rare, but it’s also a pain in the *** to build, and this one is most likely trashed from sitting with a blown head gasket and corroding.

But, how many do you ever see? I’d say pay as much as you are comfortable with if you really want it. Great conversation piece or make one of those cool engine tables out of it.