The $400 price tag is likely because it’s out of stock. It’s easier to raise the price where no one will buy it than it is to shut it down and re-create a new ad when new stock comes in.
As far as your cylinder, it looks like your air filter was missing for a time. Those vertical streaks are from debris ingestion. But there’s likely nothing wrong with the cylinder other than needing a little cleanup.
Meteor 461 and 661 cylinders run about 75% of the power of OEM just so you’re aware. 461 with a meteor cylinder runs like a 036 or 361