I was just about to say the same thing. He may have an absolute Gem with that serial number since it's very likely that Goff did the secondary and corrector. I was informed by Celestron that Goff did my scope after sending the serial number to the right person. Bob Goff was Carl Zambuto's mentor. Mine is the best SCT I've ever looked through ever in fact Kevin at SkyWatcher stopped by to see Jupiter through it on his way through town and said.... what the heck is this! The optics are absolutely tack razor sharp. Jupiter snaps into focus with amazing surface detail with world class contrast. I guarantee this will stand up to the best 8" Maks or Mewlon's costing several thousand dollars in fact I wouldn't take $3000 for this SCT. What would I replace it with? One thing I learned in this life is when you find something this good, you don't ever let it go unless you absolutely have to. So far, I've not made those mistakes. BTW, no fancy HD optics or XLT coatings. Bring it!
Maybe you got that freaky sharp 1984 black C8 i had.