The November 2017 Coin World (Vol. 58, Issue 3004) has what I consider a VERY interesting cover page article entitled "BALANCING PROBLEMS / WHEN COINS HAVE PROBLEMS, THEY MAY PRESENT A BUYER'S MARKET, WHERE VALUES ARE PLENTIFUL". I find the title a bit confusing BUT the article is well worth reading. It deals with the various coin problems that result in slabbed coins being labeled DETAILS or GENUINE or the now more unusual NO GRADES label. The article defines what are considered "problem coins" by NGC and PCGS. Then it goes on to discuss pricing considerations. The discussion limits itself to US coins but I think it can be reasonably extrapolated other areas. IMO it answers a lot (but not all) questions involving problem coins. I highly recommend finding the article and reading it.
Read it, too. Enjoyed the side-by-side of ... what was it? The 1792 half-dismes, one holed. I couldn't decide which one I would've wanted.
For that coin I'd take either. But it's not really a regular Mint business strike so I don't need it for my type set. Which is good since I have no idea where I'd scrape up that much money.
