How much should a basic 340 rebuild cost?

Oh, he identifies as many things. I'm sure he's youtube certified. Maybe he'll share a Pic of 1 of these great engines he's built over the years.. or we'll see specs borrowed from a magazine he's recently read.
LOL. I can show FOUR I've put together over the last year. Two are completed and two are underconstruction. I'm fixin to start on a fifth repairing it. It has a burned exhaust valve.