That's an interesting ad, at the limit of fraud.

"Return only if the diamond is not described in GIA report".

Yeah, and since you cannot be arsed to take a picture of the diamond, you can take one of the genuine GIA report?

And is the buyer going to wear the report or the diamond?

Bah. Buyer beware is too little. What really annoys me is that there is no way of getting these *#!$("! to stop.

Gack.

  is there any way to get an emoticon of Bill the Cat hacking a hairball?

There is no other appropriate action or sound on finding such a thing.  I like ebay, and have made a number of purchases with great success.  Vendors like this damage the entire sales environment and ought to be shot on sight.  Oh, wait.  I"m not in Texas anymore.  Damn.

  I am done with these people.  This is crazy.  It would never cross my mind to do such a thing. 

I have to admit, after the other thread about certificates being sold sans the diamond, I got really concerned.  It just amazes me how dishonest this world has become, not that selling a certificate is dishonest, it's what the use is afterward that is disheartening.  I think the way to go with eBay is GIA cert with laser inscription on the girdle, or not at all. 

Even that is not altogether safe - laser inscriptions are easier to erase and replace than falsifying a GIA report. I think the main thing is to bear in mind that eBay is not "a vendor"; it's a marketplace. And just like 47^th Street or any other marketplace it has its good, bad and downright ugly vendors. Picking the good ones and avoiding the others is what it comes down to.

DAF, I hear where you're coming from. Since I get to walk down 47th St. every single day, I'm pretty jaded. Plus for me, looking it eBay… it's horrifying.
I can see so many bad sellers, and I see these sellers getting interest from unsuspecting buyers.

I could not agree more with OMC_ choose the seller carefully- if people take their eye off the ball, they can get hurt.
An example is exactly what OMC mentioned- if one believed a laser inscription was real protection, it lessens the perceived need to trust the seller.
It's certified, right?

It's the same seller too. This is where it should become eBay's problem, but they just won't lift a finger.

Watermarking: yes, it can be done, but it takes time to make sure that the watermark does not end in a place where it spoils the photo, or where it can be removed without harm by a pirate. And with the quantity of photos David takes, it is a huge task.

What irks me is that not only are they stealing a picture, but there might be an unsuspecting person who doesn't  know that is not what they're getting.

No kidding!

Ebay is tough... even those who use their own photos can hide things by photoshopping or using odd light angles.  I remember looking at a pink pear last week that was fugly.  Totally included and had zero sparkle.  The owner went on to say how gorgeous the stone was and that it was only slightly included - a big sparkler.

Any fool looking at the video would know they were lying.  Though someone really uneducated might not know diamonds are supposed to look better than that.

I always read through the seller's feedback to see what people say.  Having a godo refund policy that allows for 100% feedback never helps me as much as seeing how many times people say not as described.  I am not sure I'd have the guts to buy ebay items a lot.