I noticed recently that a seller on here, which previously seemed reputable, has been whacking coins out of NCS problem slabs (usually with subtle cleaning or other problems) bought off Heritage Auctions and selling them as genuine. What boggles my mind is that these people make very little money off of this, so it does not really seem worth it to be so dishonest and fraudulent for such minimal profit. I have heard reports of this occurring with Teletrade, but have not seen anything there.
Here are a few examples of what I speak of, comparing the coins on heritage and on ebay. Note: You will need to sign up with heritage to view the pictures in full size, which greatly helps ID the coins by their marks, blemishes, dings, and spots. Sometimes this is difficult, but sometimes it is obvious.
1807 Draped Bust Half Dollar:
1834 Half Cent:
1910-S lincoln ICG MS 62 (not a scam, just proves he's buying on HA, since it's the same cert #)
And the GRAND FINALE: 1918/7-S standing liberty quarter, worth thousands of dollars:
This seller's pictures are decent, but he uses deceptive lighting to mask problems. There is a return policy, but many new collectors cannot detect subtle cleaning. When buying a raw coin, always check teletrade and heritage for the coin before bidding. A return policy is also good, but remember, fraudulent sellers are betting that you will not realize until it is too late. Due to low end prices, I did not lose anything from this seller, but others have. Some scams are much more subtle than others.
It's recommended that you buy key dates in CERTIFIED slabs only, meaning PCGS, NGC, ANACS, NCS, or at the very least ICG and PCI. Remember, NNC, SGS, INB, and other similar 'companies' are not real grading companies.
If you see any other heritage/teltrade problem coin scams, PLEASE let me know, and do your best to let other ebayers know, as I have done with this seller.