Well I am again amazed at the world that is
ebay. It's much different than the real world as evidenced by this seller's legacy.
http://search.ebay.com/_W0QQsassZslbaker53The seller offers numerous rare coins slabbed by the folks in the basement. A cursory look at the coins in the slabs confirms the grades are fantasy. Feedback also shows that knowledgeable collectors are returning overgraded coins. But what amazes me is the long list of buyers who chose to keep the coins and offered praise in their feedback. The seller only needs to keep about a 50% success rate to rake in huge profits, but they are above 90%. Oh by the way the seller is in compliance with the new
ebay regulations.
The downside (other than the obvious) ... down the road the buyers will face reality when they attempt to unload their coins for a profit and be soured at the experience.
Or on the upside ... down the road these buyers become
ebay sellers and pass this on to other unsuspecting noobs.

Your only defense is knowledge!