Cylinder bore is scratched up!

Hopefully they marked it somehow so they won't think you're trying to switch some crap around on um. Not that you would, but unscrupulous sellers will look for any excuse. Lets hope that's not what you're dealing with. An $800 engine should be a damn FINE core at the least. .....and it's not.
I agree, should be perfect. That would be wild if he tried that. I’m hoping since it was his, and sold out of his shop he takes full accountability, whether it’s the 800 or something equivalent. I lose a ton of time and effort no matter what, unless he really wants to make it right (doubt that).