A similiar 1833 half cent is one of a group in a past Coin Week article and is known by many for the reverse. I have sent a note to the seller, as I have emailed him on previous concerns about listed counterfeits.
So you're saying Great Southern Coins didn't have a clue on this one. If that's it, that is disturbing.
They do look at them enough to assign their "grade" in the listing titles. I recall this seller having a reputation for deceptive images. Feedback indicates they sell a lot of cleaned coins without noted it, and buyers complaining that they come back as cleaned by TPGs. I note that only 131 of their 832 listings are TPG graded.
I've heard many things about this seller before, most of them not good. I'd avoid them honestly. Probably reasonably safe buying graded coins from them if they're fairly priced but that's as far as I'd go. (I'm not even a fan of graded coins for the most part, but the reputable TPGs keep honest people honest, to be fair.) Whether it's sincere ignorance or deliberate deception might make a moral/ethical/legal difference, but on the buyer's side the distinction doesn't really matter. Better to just avoid them in any case, unless it's not a high value coin where there's not much at stake anyway.
It is true in my opinion that many of their coins have been cleaned, but so have many others out there with no mention of it in their details about the coin. I have bought two coins from them years ago and still happy with them. Once last year I was a high bidder on one of their coins listed. My fault, I should have looked closer than I did when I bid. The next day I looked at the coin again, and saw something I didn't like. I questioned them and they did allow me to withdraw my bid. It is still and always will be a jungle out there. Thanks @Jack D. Young.