If Ebay Coin Comes Back With "Details," Is Buyer Obligated?

Agreed with trout. If it comes back fake you're entitled to a refund if you can prove its the same one. However if it didn't grade how you wanted that's not grounds for a refund. Things are sold as is and there's a reason why graded coins have the premiums they do.

The only exception I would say is if the seller personally gives an assurance it would grade as say an ms 66. Then the seller is adding the assurance themselves which they have the right to do if they want. Otherwise a raw coin is what was purchased which is what the seller was contacting to deliver.

Need to see the listing to make this determination. My gut says, "no way", but I need to see what claims the seller made before making a determination.

This is more true than many people realize. Buying a raw coin when you don't know, even the basics, of grading, is a crap-shoot at best. Especially from a photo on ebay, which is the epitome of "buyer beware"

While the constant barrage of "grade this coin please" and "what do you think this coin will grade?" can get a bit pedantic here, it does provide invaluable practice and insight, for the novice, into how and why coins reach a certain grade.