It looks... different. Something was done to that cylinder to dress it up. Maybe used emery cloth or Clover compound of something?
I swear, if you cannot feel a cylinder you cannot tell if it is shot or not. I was eyeing a 250 cylinder that I pulled a few days ago and I could not tell if it was scored or not by eye, even in bright light and with a magnifier glass. But running my fingers over it, it was obvious. Low compression saw, about 110 PSI. Would not run for more than a few minutes. Piston and rings are scored, I decided to toss the cylinder as well and sell the rest of the saw in parts on Ebay.
Used jugs... I dunno. Not for me. The way he says 'genuine Stihl rings' makes it sound like the jug and pison are aftermarket. If that's the case, may as well gat a new set for about $100.