Hi to folks who really study collector cars.
No matter what type of collectible it is--car--coin--toy--the basic rules of condition,documentation,and amount produced always are
key factors in value. In the case of an engine block or assembly if this is an original it still may be worthless if improper storage has
corroded critical machined parts or it has cracked. I think it is more important to find out why it was removed in the first place, and
what its current condition is....will it be practical to save/restore this engine ? or is it just old metal. If it was a special casting like a
302 tunnel port block-from a car with documented race history this may be worth the effort. If it is a 2 bolt main 302 the one that
is currently in your car may be healthier and best left in place. As a few have mentioned it may not be worth much as it is from a mass
produced car nothing more. Sometimes the seller needs to verify that there is a good reason to finally say it has gone back to the
current owner, and hopefully you can agree on something. Good luck with whatever takes place.