@ Customer experience?
You haven't actually BEEN in an LV store, have you?
The matter is simple. Part of what they sell is the brand, the brand image and quality to go with it. In their shops they are (1) helpful and (2) knowledgeable about their products - they have to be to get the clientèle they want. That also means you would go to THEIR websites to buy the product, because it gives you the same protection and quality - they don't do middlemen very well because building a brand like that takes years.
Yes, eBay WILL devalue the brand impression. What's more, the moment eBay is allowed to sell the real thing, how are YOU going to tell the difference between a fake and the real thing?
As far as I can tell, eBay just wants to be able to put the real ones online because it makes it much harder for you to tell the difference between real and fake - they thus make money on both sides while leeching off someone else's brand. It just tells me they have a petition with 750k losers.
I cannot see a benign motive in this. Sure, those goods are expensive - those who can afford them know what they buy. If you can't afford them, find better prices alternatives, don't try to pretend something you're not. That's how credit card companies have managed to get everyone neck deep in debt.
As for another comment about grey import: decide with your wallet. If it's too expensive, don't buy it - same with region limiting although you could call that a product defect (there is never a warning on the wrapper "only plays in this part of the world" !).