Veracity of albums for sale being "sealed"?

Forgot, the turntable is a TW Akustic Raven One.

Not that this has much to do with what I'm personally after when I go record shopping, but technically speaking, even a genuine SS is no guarantee of Mint condition on the inside -- a wide variety of undiscovered defects are possible, some not knowable unless heard, plus I actually want to PLAY what I buy rather than put it under glass (a horrible act which, if something's Mint, immediately makes it Near Mint) -- so combined with the everpresent authenticity question, I normally take a dim view of dealers asking large premiums above Mint for allegedly SS merch.

No relationship to quality. In the end, it is the individual pressing. In the "golden years", many labels had sufficient quality problems due to making runs in the millions, because popular artists sold to that level. I see this with lots of popular titles. Their answer to quality control was that the end user simply returned these at POS. So you have an equal chance picking up problematic vinyl over pristine copies.